Search

Computing technologies and methodologies always take a turn and right now, quantum computing and its mechanics are the most engaged field. This lets us propose models using quantum physics concepts and quantum mechanics. This not only opens us the scope for gaining better efficiency but also gains a new way of proposing algorithms. The current problem with the financial models is that they do not consider the negative possibilities that might lead to wrong and also inconsistent results. Additionally, this also makes usquestion the algorithm in the work itself. Even if the systems do solve all these inconsistencies, the hardware requirements of those systemsare very high. This algorithm uses quantum-based theories to make daily computations faster without extra or high-end hardware. This algorithm is more oriented toward the financial model where it takes into consideration of negative cases. Experimental results show thatthe algorithm proposed obtains the desired and optimum values based on models like Ising, Markowitz, and QUBO. [ABSTRACT FROM AUTHOR]

We analyze the spontaneous emission dynamics of a quantum emitter near a topological insulator Bi2Te3 nanosphere, using a combination of electromagnetic calculations and quantum dynamics simulations. For the study of the quantum system dynamics, besides the excited state population dynamics, different non-Markovianity measures are used. We also estimate the quantum speed limit in the system. For large free-space decay rates, the dynamics has strong non-Markovian features, which correlate directly with large values of non-Markovianity measures and possible significant quantum speedup of the dynamics. The dynamical features become gradually Markovian as the free-space decay times become long, while the corresponding non- Markovianity measures tend to zero and the quantum speedup diminishes. [ABSTRACT FROM AUTHOR]

In this work, the theoretical study is presented to calculate the photon emission production at high energies of the anti-strange interaction with gluon based on the hard scattering process according to the QCD theory of quantum chromodynamics. The theoretical framework was to predict the study and calculation of the photon output emission which included the effect of the force coupling constant, the thermal energy of the system, the chemical potential, and the transience parameters of quarks and gluons on the yield of photons for s̅g→u̅γ interaction system. The results in these procedures were calculated to produce photons that are provided depending on the reaction system thermal energy in the range 360MeV ≥ T ≥ 180MeV and the critical temperature; 125.93MeV, 151.26MeV, 170.01MeV and 188.90MeV.MATLAB software version R2014A and its 2018 origin were implemented to evaluate the photon output emission with a stoichiometric potential μ = 0.500 GeV, quark fugacity λq = 0.02 and gluon fugacity λg = 0.06. The significant influence of the critical temperature, coupling instantaneous strength, and photon energy on the photon output emission of the s̅g→u̅γ interaction was investigated. The photon yield decreased as the coupling strength of the anti-strange quark interaction with gluon increased due to an increase in the thermal energy of the system from 180 MeV to 360 MeV. The primary benefit of lowering the photon output emission at higher photon energy is to indicate less strong coupling between the anti-strange quark and the gluon. [ABSTRACT FROM AUTHOR]

In this paper, a theoretical model of quark gluon was introduced based on quantum chromodynamics theory. The Big constant B1⁄4 = 0.3GeV, fugacity of quark גQ = 0.068, fugacity of gluonגG = 1, system temperature in range (185-305)MeV, the photon energy in ranged from 1 GeV to 3.5 GeV are used to calculate the rate of photons emission for cg → sγ, cg → dγ systems at bremsstrahlung processes. It was found that the rate of photons emission increases with increases of the flavour number and system temperature and decreases of the coupling strength per contra, it decreases with increases of the photon energy. These results in the photons emitted for the cg → sγ system being greater than the cg → dγ system. [ABSTRACT FROM AUTHOR]

In this paper, the theoretical treatment is presented to calculate the production rate of thermal photons at high-energy quark-gluon plasma based on the Compton scattering process based on quantum chromodynamics theory. Theoretical framework predictions were studied for calculating the photon rate that includes the influence of the strong coupling constant, the chemical potential and the transience factor of quarks and gluons on the rate of photons for the ug → sγ quark system. In these procedures, the results were calculated for the rate of photons provided according to the heat energy in the range 625MeV≥ T ≥125MeV and critical temperature (157.09, 175.21 and 193.34) MeV. MATLAB program was implemented to calculate the photon rate with a chemical potential μ = 0.350 GeV, quark fugacity λq = 0.118 and gluon fugacity λg = 0.761. The significant influence of the critical temperature, coupling strength, and energy of photons on the emission rate of the ug → sγ system is investigated. The photon rate decreased as the strength of the quark-gluon coupling increased due to an increase in the system energy from 125 MeV to 625 MeV. The primary benefit of the lower rate at higher photon energy indicated less coupling between the quark and the gluon. [ABSTRACT FROM AUTHOR]

In this work, experimental study for the chaotic dynamics of a quantum well semiconductor laser (SL) (1310 nm wavelength) with anoptical loop mirror is investigated. The spikesareintroduced by configuring this external cavity type. Making one arm from this cavity be attenuated led to retardation for it. Disturbance in longitudinal lasing mode resulted in chaotic spectrum. Bandwidth for this signal is very limited and changeable under the attenuation ratio. In comparison to pure optical feedback, the achieved signal is lower and evolved from kHz band (in 4.3 v bias voltage) to MHz band (with higher voltages i.e., 4.7 and 4.8 volt). The first range included 300% higher amplitudes for the lasing modes, while the later was equivalent to the random like signal amplitudes. Such a range can be employed for laser wavelength fine tuning applications with the benefit of not disturbing the laser medium. This results opens the door for mixing resulted signal with another oneprimary subjects to pure optical feedback. [ABSTRACT FROM AUTHOR]

In this experimental study, the dynamics of a quantum well semiconductor laser (SL) under optoelectronic (OE) feedback are investigated. The feedback is configured by splitting the optical signal emitted by this laser into two identical parts, one of them is detected and then modulated into the laser bias current. Results indicate a variation in laser instability from one state to different states according to the feedback strength. The bias voltage is also individually changed to measure the weight of the pumping level. Width of main lasing peaks, at multi lasing state, are measured. Laser response to these two parameters are measured and analyzed. The multi-pulsation is observed according to this, pulse width is measured versus parameter, resulting relations that has been recorded are transformed as the following; sine, logarithmic, Gauss, finally, exponential. This is due to the self-electro optic effect that forced the laser device to follow the perturba. [ABSTRACT FROM AUTHOR]

In this work, we study the method to accelerate the dynamics of quantum harmonic oscillator. This method is originally proposed by Masuda and Nakamura in 2010 by performing the adiabatic phase and time scaling function. An adiabatic phase is needed to guarantee the adiabatic dynamics of wave function and the time scaling function is used to accelerate the dynamics of such dynamics. By using the Schrodinger equation, the formula of additional phase is obtained. Here We apply the formula to obtain an additional phase of quantum harmonic oscillator. We obtained the additional adiabatic phase for ground state and first excited state. We found that the additional phase to guarantee the adiabatic motion in quantum harmonic oscillator is state-independent. This adiabatic phase is used to accelerate the adiabatic dynamics together with a time scale function. [ABSTRACT FROM AUTHOR]

With the consistently expanding consideration for operating speed and convenience of use, customary systems can't accomplish these couple of goal. Since customary systems are reliant upon traditional mechanics, their development is at an all-time high. Because of these consequences, quantum mechanics emerged as a distinct advantage in the rally of computation. Quantum computing is an entirely different kind of data processing that must be achieved by using physical phenomena that are unique to quantum physics. This research paper focuses on attractive field of quantum computing. The paper highlights time line of the quantum computing along with its topology, computations, principles and at last applications associated with it. The study of this paper conserve as a guide to get familiar with the basic concepts and utilization of quantum computing. [ABSTRACT FROM AUTHOR]

A new equation of state for 304L stainless steel has been constructed and entered in the Los Alamos National Laboratory SESAME database with material ID 4273. The equation of state is based on a multiphase approach. The solid and liquid phases were fitted to available experimental data for thermal expansion, heat capacity, and shock Hugoniot, as well as to data from density functional theory calculations of the cold curve and quantum molecular dynamics of the liquid regime. The electronic thermal contribution over the entire equation of state range is based on Tartarus (Green's functions) average atom calculations. For this low-carbon stainless steel both the density functional and electronic thermal calculations are comprised of 19 wt% Cr, 10 wt% Ni, and the remainder Fe. [ABSTRACT FROM AUTHOR]

The drop weight impact sensitivity of a series of derivatives of pentaerythritol tetranitrate (PETN), where the energetic nitrate esters have been sequentially replaced by inert hydroxyl groups, has been investigated. As nitrate ester groups are lost the drop height required for the initiation of the violent reaction, H50, increases precipitously from about 20 cm for PETN to about 320 cm for the mono-nitrate ester derivative, PEMN. Gas-phase quantum molecular dynamics simulations show that all four molecules, PEMN, PEDN, PETriN, and PETN, have the same trigger linkage chemistry centered on the nitrate ester groups. We find that the decrease in sensitivity across the series is connected to the decrease in the enthalpy of explosion, Q, in accord with the Bell-Evans-Polanyi theorem. The relevance of the simple, gas-phase-derived molecular properties and the associated model to complex, condensed-phase quantum molecular dynamics simulations of the lead up to thermal explosion in PETN, PETriN, PEDN, and PEMN is analyzed in detail. [ABSTRACT FROM AUTHOR]

In this paper, by using the theory of quantum calculus, we introduce a class of combinatorial numbers and polynomials. In particular, the class of q-combinatorial numbers introduced in this work is a q-analogue of the combinatorial numbers recently defined by Simsek [9]. We also construct a formula for the generating functions of these q-combinatorial n umbers in terms of q-exponential functions. Furthermore, applying q-derivative, we analyze some properties of these q-combinatorial numbers and their generating functions. As a result of this analysis, we give a few remarks related to our findings. Finally, we conclude the paper with a brief observation on our results. [ABSTRACT FROM AUTHOR]

There is a consensus on the importance of teaching/learning quantum mechanics in teacher education, but the way to implement this can vary widely depending on the goals. We cannot avoid the current, traditional secondary school curriculum, which includes wave-particle duality, bound states, and so on in most countries. But it is also worth preparing students for the second quantum revolution, which is about quantum computations. Approaches based on two-state systems not only provide an alternative foundation but also an introduction into quantum computations. They are also beneficial because educational researchers have already explored the power of two-state-system-based approaches such as the Dirac polarization approach in secondary school. So, applying two-state approaches can bring quantum computation closer, prepare the general formalism of quantum mechanics through illustrative examples and provide a new pedagogical insight in secondary school. In this paper proposals are presented for integrating the Dirac polarization approach into teacher education. It is shown how the formalism of QM can be adapted to the students' prior knowledge, and extra topics can be added bridging the gap between secondary school and university. [ABSTRACT FROM AUTHOR]

Bayesian probability considers probabilities as degrees of plausibility that must be updated according to newly available information or evidence. In the standard application of this theory, the possible side effects of the act of measurement are not considered, and because of this the results of the updating do not depend on the ordering of two such measurements. In this work we develop the application of Bayesian probability theory to non-commutative measurements on a system. We show that the resulting formalism can be cast in an abstract way which is surprisingly close to quantum theory, together with a complex Hilbert space, linear operators representing measurements and a density operator encoding a state of knowledge. [ABSTRACT FROM AUTHOR]

This study has the aim to analyze Borobudur with 72 stupas that had been moved from Ratu Baka area as Quran 3.96 interpretation based on the method of R12 and R47. Baka Borobudur is a building that had been built by the same generation. The constant 72 is found in quantum physics and worship values. The object of this study is the stupa in the Baka Borobudur area. This study conducts in a desk study by searching books, journals, scriptures, and internet media. The methodology uses qualitative reflexivity with the comparison of the Hahslm formula. The results consist of 72 stupas above Borobudur were previously from the Ratu Baka palace. There is 1 stupa left in the Ratu Baka area that has the same pattern as the stupa in Borobudur. The name of Baka has been encrypted in Holy Book. In QS. Ali Imran [3]: 96 is written that the first building that had been built for humans was by Bakah as a female with ta marbutoh. There is numerology of 396 in the form of a combination (3+9) x 6=72 that is directly the same as 72 stupas. The digital of 72 can be found in interference physics with reflexivity to stupas. In the main building of Borobudur, there is a floor of rectangular and circular with a code of 5.3 that the same with Quran Al-Maidah 5.3 about Islam. [ABSTRACT FROM AUTHOR]

This work is devoted to the comparative study of the lattice specific heat of Cu(en)(H2O)2SO4, Cu(en)2SO4 and Cu(en)2CrO4, where en=ethylenediamine - C2H8N2. Previous studies on the effects of spatial anisotropy of exchange coupling within the magnetic layer showed that quasi-one-dimensional polymer structures based on Cu(II) ions, Cu(en)(H2O)2SO4 and Cu(en)2SO4 represent realizations of spin 1/2 Heisenberg model on the spatially anisotropic zig-zag square lattice and the dimerized square lattice, respectively. The substitution of S-Cr in isomorphic Cu(en)2SO4 and Cu(en)2CrO4 introduces differences in lattice specific heat. The description of the heat capacity of the lattice up to room temperature was carried out considering the contribution of acoustic phonons within the Debye model and optical phonons using Einstein approximation. Deviations of the Debye model from the lattice heat capacity are already observed above 15 K for all compounds, for Debye temperatures θD = 146 K, 101 K and 94 K for Cu(en)(H2O)2SO4, Cu(en)2SO4 and Cu(en)2CrO4, respectively. The effect of acoustic and optical modes on magnetic correlations in these systems is also discussed. [ABSTRACT FROM AUTHOR]

Quantum Cosmology as the name suggests is a quantum approach to the origin and existence of universe. The Big Bang theory remains to be a standard model of cosmology and yet there are a few fields in which the theory could not leave its influence and failed to explain them like the horizon and the flatness problem. Quantum theory could explain almost all of the problems faced by the Big Bang theory. The central equation around which the whole theory of quantum cosmology revolves is the Wheeler DeWitt equation and the boundary conditions to the wave function will provide observational data on the universe. After getting a general idea of quantum cosmology, the main purpose is to make predictions and get observational results on fields like period of inflation and density perturbations. The arrow of time is a consequence of these density perturbations. [ABSTRACT FROM AUTHOR]

Conductivity tensor in a rectangular quantum wire with infinite potential is calculated in the presence of two external fields, laser field, and linearly polarized electromagnetic wave field. Conductivity tensor is calculated based on the theory of quantum kinetic equations for electrons in quantum wires. The conductivity tensor expression shows its dependence on the amplitude, frequency of the external field, and characteristic quantities for a rectangular quantum wire with infinite potential. This work also investigated and plotted the dependence of conductivity tensors to the external fields, the quantum wire studied here is the quantum wire GaAs / GaAsAl. The dependence of the conductivity tensor to the external field is nonlinear, at different frequency bands, the dependence is different. The conductivity tensor depends a lot on the laser field amplitude and temperature of the system. [ABSTRACT FROM AUTHOR]

We have study the characteristic of electron transfer at senstizer N3 molecule dye contact to SnO2 due to calculate the electronic transfer rate and transition energy using theoretical model. The calculations have been performed using the quantum transition theory and molecular mechanics level, based on alignment of molecule energy levels with conduction energy levels of semiconductor. Different solvents 1,2-Dimethoxyethane, Ethanol, Methanol, Chlorobenzene, 2- Methoxyethanol, Pyridine and N,N-Dimethylformamide are taken media for N3 - SnO2 devices system. The transition energy is strong relative to refractive index and dielectric constant and increased with increased dielectric constant and decreased refractive index The electronic rate contribute increased with increased transition energy and the system of N3 - SnO2 devices has maximum rate with methanol solvents while it has minimum rate with Chlorobenzene solvents. We have also the electronic rate increased with decreased driving force energy and increased coupling strength. [ABSTRACT FROM AUTHOR]

We present a simple model of charge transfer current through sensitizer N3 molecule contact to TiO2 and ZnO semiconductors to calculate the charge transfer current. The model underlying depends on the fundamental parameters of the charge transfer reaction and it is based on the quantum transition theory approach. A transition energy, driving energy and potential barrier have been taken into account charge transfer current at N3 / TiO2 and N3 / ZnO devices with wide polarity solvents Acetic acid, 2-Methoxyethanol, 1-Butanol, Methyl alcohol, chloroform, N,N-Dimethylacetamide and Ethyl alcohol via the quantum donor-acceptor system.The effects of the transition energy and potential barrier are computed and discussion on charge transfer current. Moreover, the transition energy of N3/TiO2 and N3/ZnO devices have been slightly increase with increase dielectric constant and decrease refractive index. The data show that charge transfer current increases with decrease all parameters transition energy, potential and driving energy. It was show the charge transfer current is large for low driving energy ΔFE0∼0.3 eV. Consequently, the N3/TiO2 device has given large charge current compare with N3/ZnO device in room temperature with same solvent and driving energy. [ABSTRACT FROM AUTHOR]

In this busy world, there is an estimation of 3.5 exabytes of information data been generated in a single day and the data is shared on more than 10 million computing devices. As We, human beings are wholeheartedly dependent on the digital based computing devices for knowledge sharing by means of text and image information for each and every commotion of the day. Now, the sustenance of life without computing is considered as perplexed. As per a report submitted by association of semiconductor industries which states that by 2040, it is not possible to provide power to computer machine which is available in good running conditions present throughout the globe. It's a known fact that the fundamental functionality of a computer system to modify and save the information data. Presently all the computer systems are using the classical technique to manipulate the data using single bits that stores the information data in form of 0's and 1's. [1To overcome the inability stated by semiconductor industry, the quantum physics has come up with a new concept which specifies that the quantum elements have the tendency to move in both directions i.e. fore and rear directions and its presence can be felt in both places at same time and travel itself instantly]1. This peculiar tendency of quantum particles had lead to quantum computing. The most critical property of quantum computing is its enhanced asset for characterization and construction of information data. A mechanism is developed to work on various operations for computation of information data. Qubits i.e quantum bits are used in Quantum computing, it consist of a third state excluding the traditional data states 0 and 1.Hence the time duration taken by quantum computing to modify the information data is much lesser than that of traditional computing. In this paper, we try to explore the concepts of quantum computing, how it is related to physics, how it can be used and implemented. [ABSTRACT FROM AUTHOR]

Being an abstract part of physics, quantum physics requires teachers to use multiple representations, especially in introductory courses. Interactive applets and other means of visualization are considered one way to overcome students' difficulties in studying basic concepts such as the wave function, the probability density function, quantum measurements etc. Based on 10 years of our positive previous experience, we strongly emphasize graphical representation in the quantum physics course for future upper secondary school teachers. Besides using internationally well-known sources like Physlets Quantum Physics, PhET simulations, or Quantum Visualisation Projects (QuVis), we also prepared our own tools for the purposes of this course. Moreover, because we consider Czech terminology knowledge to be very important for future physics teachers, we have translated selected applets into Czech. In this paper, we would like to share our experience with using the above-mentioned applets and with their integration into active learning instruction. We pay special attention to the period of distance learning, which especially pointed out the benefits of this approach; to support this claim, we provide students' feedback on the use of applets in our course. [ABSTRACT FROM AUTHOR]

We present the analysis of the identified hadrons (π±, K±) produced at mid-rapidity (|η| < 0.5) in collisions of Au-Au ions with energies S N N = 4 , 7 , 9 and 11 GeV. Particle momentum spectra for charged hadrons (pions, kaons) are measured using data from Monte Carlo generator of Ultrarelativistic Quantum Molecular Dynamics (UrQMD) with particle reconstruction made with the response of Multi-Purpose Detector (MPD) obtained with GEANT3 simulations, on Monte Carlo input. We analyze particle multiplicity dependence on the collision energy. Centrality dependence of transverse momentum spectra was calculated for all particle species. Our goal is to study possible signatures of the phase transition between the hadron state of matter and the quark-gluon plasma (QGP) state. [ABSTRACT FROM AUTHOR]

A semi-classical transport model, namely, quantum molecular dynamics (QMD) model, is employed for the theoretical study of nuclear dynamics in case of 197Au+197Au collisions at different beam energies from 20 to 1000 MeV/nucleon and at impact parameters from b = 0 to 13 fm using soft equation of state (EOS). In particular, we study the energy and impact parameter dependence of various quantities like average and maximum density, collision rate and participant-spectator matter. Our findings clearly indicate a significant energy and impact parameter dependence of all quantities. Interestingly, we observed that the variation of the impact parameter leads to drastic change in the participant/spectator matter up to 400 MeV/nucleon, whereas beyond 400 MeV/nucleon, nearly impact parameter independent results are found. [ABSTRACT FROM AUTHOR]

We performed a systematic study of the formation of fragments with different mass ranges in 197Au+197Au collisions at incident energies between 20-1000 MeV/nucleon and at impact parameter between b = b/bmax = 0-0.98. In our present study, the dependence of fragment production on incident beam energy and geometry of the reaction is seen. Our results clearly indicate that the Quantum Molecular Dynamics simulations of 197Au+197Au predict different behavior for different mass ranges than for Intermediate Mass Fragments (IMF's) with a change in incident energy and impact parameter. All charge yields (3≤Zfrag≤12) can be parameterized by a power law (Zfrag−τ) and no signal of liquid-gas phase transition is seen as no unique dependence of τ on impact parameter is seen. [ABSTRACT FROM AUTHOR]

The problem of heat conduction in silicon nitride (Si-N) thin film with micrometer thickness has been investigated with a new scenario of in -plane and cross -plane concepts with the help of modified Callaway model. Using the Green's function theory of many body quantum dynamics the relaxation time (linewidth) has been derived to understand the phenomenon of phonon transport through different scattering mechanisms. These scatterings play a vital role to elaborate movement of phonons as well as thermal conduction inside the microfilm with special context of in-plane and cross-plane thermal conductivity. The obtained result shows a fair agreement with experimental observations. The theory explores the possibility of device fabrication with low heat conduction in one direction and high in the other. [ABSTRACT FROM AUTHOR]

This study aimed to develop a digital worksheet with PhET simulation on quantum physics phenomena to enhance students' High Order Thinking Skill (HOTS). The development was conducted Borg and Gall model with four steps; literature study, product development, validation, and evaluation. The digital worksheets were validated by material and media experts, the results were 79.3% and 87.8%, respectively. After that, a final-product test or field test was applied to students by conducting pre-test and post-test. These tests analyzed the increment of students' knowledge before and after providing the digital worksheet. The N-gain score of pre-test and post-test was 0.5, which means moderate. The final-product test was also presented to the teacher. Based on the results, the digital worksheet with a PhET simulation on the quantum physics phenomenon was feasible to increase the high school students' HOTS. [ABSTRACT FROM AUTHOR]

We study a ferromagnetic instability in a single-band Hubbard model on the hypercubic lattice away from half filling. Using dynamical mean-field theory with the continuous-time quantum Monte Carlo simulations based on the segment algorithm, we calculate the magnetic susceptibility in the weak and strong coupling regions systematically. We then find how ferromagnetic fluctuations are enhanced when the interaction strength and density of holes are varied. The efficiency of the double flip updates in the Monte Carlo simulations is also addressed. [ABSTRACT FROM AUTHOR]

White noise analysis has gained considerable attention in the past years in the analysis of quantum systems, polymer entanglement, transport, and diffusion phenomena. However, there is dearth on the application of the analysis into open quantum systems specifically coupled harmonic oscillators in an environment. In this work, white noise analysis was used to study the dy- namics of the propagator of an open quantum system consisting of coupled harmonic oscillators that are coupled to an environment consisting of N-2 multimode harmonic oscillators. The quantum propagators were obtained after solving for the normal modes of the system-environment interaction to decouple the coordinates in the Lagrangian describing the dynamics of the system, the environment and their interaction with each other. The decoupled Lagrangian was used in the path integral corresponding to the propagator of the system, with the path integral evaluated using white noise analysis. The resulting propagator was found to consist of the product of N simple harmonic oscillator propagators. N-3 of these propagators correspond to the degenerate normal mode frequencies of the system-environment interaction, while the other three correspond to the non-degenerate normal mode frequen- cies, two of these nondegeneracies correspond to complex normal modes. This approach of describing the dynamics of the open quantum system greatly simplifies the task mathematically. [ABSTRACT FROM AUTHOR]

Binding energy of a hydrogenic donor impurity in GaAs/Al0.3Ga0.7As Quantum Ring (QR) under the influence of an external magnetic field along with the effect of conduction band non-parabolicity has been calculated. QR has been confined in a quantum well of suitable width which serves as the height of the quantum ring. The external magnetic field enhances the binding energy of the donor because of its additional confinement. Since QR is a one dimensional structure, this additional confinement given by the magnetic field restricts the motion of the carrier further and increases the localization which in turn increases the binding energy of the donor. The incorporation of band non-parabolicity significantly alters the effective mass of the carrier which reduces the binding energy. Application of magnetic field in larger rings reduces the binding energy because of the larger lateral space provided by the ring. Strengthening the inner barrier greatly increases the binding energy irrespective of magnetic field. The effect of impurity location on the binding energy has also been calculated. Also it has been observed that band Non-parabolicity is more effective for edge impurities when compared to other impurity locations. [ABSTRACT FROM AUTHOR]

The paper proposes a color contrasting method for X-ray images post-processing. Based on the quantum theory of color vision, this method ensures psychological compatibility between the colored image and the initial grayscale image. The method was tested by processing 70 digital radiographs of different anatomical areas using several various color scales. To evaluate the proposed method, a group of medical specialists took part in the testing process. They estimated overall effectiveness as well as differences between color scales and saturation grades. Most of the doctors stated the usefulness of color contrasting and recommended to implement it into the X-ray post-processing systems. Furthermore, special preferences and constraints were formulated during the testing process. [ABSTRACT FROM AUTHOR]

Currently, the applications of medium-scale systems composed of superconducting qubits are mostly limited to testing basic principles of quantum computation, demonstrating those as proof-of-concept designs and developing scalable software and hardware interfaces to them. Although this is useful in terms of encouraging future developments in the domain, an alternative approach exists to exploit the built-in quantum properties of such devices to experiment with fundamental physical models. There already were [1, 2, 3] some successful attempts to use small arrays of superconducting qubits to observe inherently quantum analog behaviour of these systems, and this work is aimed to continue those studies. We are developing a chip to experimentally simulate crystal structure, many-body localization and heat transport properties with a chain of XX-coupled transmons. First, we introduce the investigated system Hamiltonian. Second, we describe a chip design and calculations for obtaining required parameters. Then we observe methods of classical and quantum mechanics for dynamics simulation of the system. Finally, we provide some theoretical results. [ABSTRACT FROM AUTHOR]

From time to time, some eminent physicists commenced to ask: What is the reality behind quantum mechanical predictions? Is there a realism interpretation of Quantum Physics? This paper is intended to explore such a possibility of a realism interpretation of QM, based on a derivation of Maxwell equations in Quaternion Space. In this regards, we begin with Quaternion space and its respective Quaternion Relativity (it also may be called as Rotational Relativity) as it has been discussed in several papers including [1]. The purpose of the present paper is to review our previous derivation of Maxwell equations in Q-space [17], with discussion on some implications. First, we will review our previous results in deriving Maxwell equations using Dirac decomposition, introduced by Gersten (1999). Then we will shortly make a few remark on helical solutions of Maxwell equations, Smarandache’s Hypothesis and possible cosmological entanglement. Further observations are of course recommended to refute or verify some implications of this proposition. [ABSTRACT FROM AUTHOR]

We transform the system/reservoir coupling model into a one-dimensional semi-infinite discrete chain with nearest neighbor interaction through a unitary transformation, and, simulate the dynamics of free dissipative open quantum system. We investigate the consequences of such modeling, which is observed as finite size effect causing the recurrence of particle from the end of the chain. Afterwards, we determine a formula for π in terms of the matrix operational form, which indicates a robustness of the connection between quantum physics and basic mathematics. [ABSTRACT FROM AUTHOR]

In the contribution we are dealing with the influence of the suitable experiment choice on cognitive process of constructing basic knowledge of quantum mechanics. Specific examples of experiments are compared (double-slit experiment, interference on Mach-Zehnder's interferometer, Stern - Gerlach experiment) and their didactic potential applicable in the quantum physics basic course. The advantages and disadvantages of the individual experiments are discussed from methodological and didactic point of view. [ABSTRACT FROM AUTHOR]

We present our experience and preliminary results from teaching modern physics using smartphones at one of Slovak secondary schools. To be more specific, we developed teaching materials in the framework of flipped learning, applying Feynman’s many-path quantum model together with current digital technologies - GeoGebra simulations (www.geogebra.org) designed for smartphones. Using theoretical and mixed methods research, we report our current progress in answering the following research questions: What impact do smartphones have on the teaching and learning process? How simulations in the context of flipped learning contribute to the visualization, motivation and students’ mental models in the modern physics world? [ABSTRACT FROM AUTHOR]

The nature of the Ru-Ru, Ru-C and Ru-CO interactions in the di-bridged triruthenium carbonyl cluster [Ru3(μ3-κ²-MeImCH)(μ−CO)(CO)9] have been explored theoretically the topological analysis of the electron density using Quantum Theory of Atoms-in-Molecules (QTAIM) approach. The topological properties of the electron density involved in the metal–metal and metal–ligand bonds as well as the bond delocalization indices δ(A, B), have been computed, are highly agree with the previous results for organometallic systems studies. The analyses of the core of bridged triruthenium cluster, Ru3C2 part, reveal the existence of an Ru(1)-Ru(3) and Ru(2)-Ru(3) bond critical points associated with a bond paths running between those atoms. However, neither Ru(1)-Ru(2) critical point nor bond path are observed. The delocalization indices calculated for Ru-Ru indicate the significant indirect Ru(1)…Ru(2) interaction mediated through presence of the carbonyl and alkylidyne bridging ligands. An interaction of 5c–8e type is proposed to exist over their fifth-membered, Ru3C2 core part. The electron density ρ(r) and Laplacian ∇²ρ(r) parameters computed for the Ru-C(NHC) were indicative of significant pure σ bond character for this interaction. In addition, the analysis of the data of the topological properties involved in the N-heterocyclic carbines ligand bonds reveals the existence hindered π-electron delocalization over the ring with appearance some feature of double bond for the bonds that linked the carbine C atom and the two neighboring N atoms. [ABSTRACT FROM AUTHOR]

We perform a variational calculation to obtain the polaronic corrections to the ground state and first-excited state energies of an electron in a two-dimensional parabolic quantum dot of a polar semiconductor in the presence of Rashba spin-orbit interaction for the entire range of electron-phonon coupling constant and confinement length. We also present the results for the bound polaron problem. It is shown that for both the models in the absence of any external magnetic field, first-excited states with non-zero angular momentum get split into two branches for up and down spin of the electron due to Rashba spin-orbit interaction, whereas ground states with zero angular momentum show no spin splitting in both the cases. Application of our theory to GaAs quantum dot shows that polaronic corrections are reasonably large for quantum dots when their sizes are reduced to a few nanometres. But the polaronic corrections remain unaffected by Rashba spin-orbit interaction. [ABSTRACT FROM AUTHOR]

The cumulants of baryon multiplicity distribution in relativistic heavy-ion collisions (HICs) have attracted considerable attention recently. It has been conjectured that they may serve as a promising observable to detect the critical end point in the QCD phase diagram, while the cumulants in HICs at intermediate energies have not been widely studied to date. How to interpret the cumulants data at intermediate energies and compare with the data at relativistic energies is now being actively discussed. Both meam-field potential and clustering are highly important to HICs at intermediate energies. In this talk, we discuss these effects on the cumulant ratios of baryon number distributions in Au+Au collisions at beam energies of 1.23 GeV/nucleon which have been currently performed by the HADES Collaboration at GSI. Within the newest version of the ultrarelativistic quantum molecular dynamics (UrQMD) model, calculations with different mean field potentials as well as without mean field potential are performed. It is found that the mean field potential enhances fluctuations in the momentum space during the expanding stage, especially in a small rapidity acceptance window. The enhancement of cumulant ratios for free protons is suppressed compared with that for all baryons. [ABSTRACT FROM AUTHOR]

This paper describes the overview of quantum approach for measurements and analysis of data, obtained with the help of acoustic emission, which is considered as a new approach in the field of detection, determination of coordinates and monitoring of sources of acoustic emission associated with discontinuities on the surface, or in the volume of the vessel wall, welded joint and manufactured parts and components. An analysis of the advantages of this approach over the classical approach is given. A block diagram of the quantum system of AE (acoustic emission) – control is presented. [ABSTRACT FROM AUTHOR]

For the first time, authors have designed and characterized Si/4H-SiC asymmetrical super-lattice p++-p+-n-- n-n++ type pin switch in D and Y-band communication systems by incorporating the Quantum-Modified Drift-Diffusion (QDD) model. It has been observed that the RF series resistance of the exotic super-lattice p++-p+-n-- n-n++ type pin device operating at around 140GHz (D-band) and 220GHz (Y-band) frequency regime reduces due to the incorporation of QDD model. The designed super-lattice pin devices are considered as SPD1 for D-band and SPD2 for Y-band. The proposed SPD2 devices offers the faster reverse recovery time (~0.11ns) and low forward RF-series resistances (0.78Ω) compared to its SPD1 counterpart. The SPD2 shunt SPST switch also offers low insertion loss (0.085dB at 140GHz & 0.097dB at 220GHz) and high isolation (49dB at 140GHz and 30dB at 220GHz). An excellent agreement between experiment and theory establishes the advantage of the proposed model over the others. [ABSTRACT FROM AUTHOR]

This work aims to examine the power of an energy dependent coordinate mapping to facilitate the solution to Schrödinger equations for screened Coulomb potential systems. The model system is taken as two particle system in only interparticle distance dependent potential which is also spherically symmetric. Since time independent Schrödinger equation of such system can be reduced to relative motion separated out of angular coordinates, the wave function becomes dependent on relative radial variable only and the motion can be investigated more easily. The energy parameter is taken as v²/2 since only bound states are considered. First an unknown coordinate bending function is defined in terms of the coordinate and energy arguments. After appropriate assumptions the resulting spectral problem is solved and the potential function is obtained in terms of coordinate bending function which we called “Characteristic Potential for the Coordinate Bending”. Then appropriate efficient coordinate bending structures can be sought to somehow match the Characteristic potential with the true given potential and system energy can also be identified through this procedure. [ABSTRACT FROM AUTHOR]

In this note we present a concise overview of the quest of the nuclear theory community to propose and vindicate a viable microscopic many-particle quantum theory which is capable of explaining and predicting the great diversity of recent data coming from observations of neutron stars based on the motions of the individual nucleons in the stars. We dedicate special attention to the coupled-cluster method for nuclear matter calculations. [ABSTRACT FROM AUTHOR]

In this work, we present the computation of fragmentation cross-section of 28Si ion beam projectile incident on 12C target of depth 1.31 g/cm². The Monte Carlo (MC) code-based toolkit Geant4 written in C++ language is used for the simulation study. Three different models of physics, the Quantum Molecular Dynamics (QMD), the Leige Intranuclear cascade (INCL), and the Binary Cascade Model (BIC) models are activated separately in the Geant4 PhysicsList class. The computational results are comparatively analyzed with respect to experimental data. The fragmentation cross-section of Si ion for incident energies 266 A MeV, 344 A MeV, 560 A MeV, 765 A MeV, and 1147 A MeV is computed. These models regenerate experimental results of projectile fragmentation cross-section with good agreement taking acceptance angle of experimental technique into consideration. [ABSTRACT FROM AUTHOR]

The thermoelectric properties of SrTi0.92R0.08O3 (R=Ta, Ho) were investigated using First principle approached in DFT. Quantum Espresso software are used together with BoltzTraP code which based on semiclassical Boltzmann transport theory to determine the thermoelectric properties at temperature range of 200K - 800K. In electronic properties calculation, density of state and partial density of state were analyzed. The doped element R influence the Fermi level position by crossing the conduction region causing samples becomes metallic in nature. STTO is p-type by nature while STHO is n-type. At room temperature the figure of merit (ZT) of 0.14 and 0.04 were recorded for STHO and STTO respectively. Maximum ZT of 0.35 were observed at 650K for STHO and 0.25 for STTO at 800K. Compared to previous work on Sr site doping, Ti site ZT result is relatively low. [ABSTRACT FROM AUTHOR]

The Hypergeometric method was used to describe radial equations by probeneus approaximation at a singular regular point. Schrodinger equations radial part was reduced into differential equations with variable substitution. By using q-deformed momentum parameter and Coulomb potential as well as variable substitution, the second order of Schrodinger equation with centrifugal approach for q-deformed momentum in Coulomb potential can be solved with Hypergeometric method. The analytical result of energy spectrum and wave function with quantum number and qdeformed variations, while the numerical result for energy spectrum can be calculated by using Matlab 2013 software. [ABSTRACT FROM AUTHOR]

The phenomenon of transition energy has been analyzed using isospin dependent quantum molecular dynamics model. Simulations have been carried out for various mass asymmetric nuclear reactions, keeping the target mass fix and varying the mass of projectile at incident energies, E=50 and 400 MeV/nucleon. Our study reveals that transition energy is more suitable parameter to study the different type of nuclear reactions and is helpful to understand the reaction dynamics. [ABSTRACT FROM AUTHOR]

We investigate the cooling of mechanical resonator in the quantum regime by using the effective master equations, which can be applicable with and without rotating-wave approximation (RWA) in linear regime. We show that the improved lower bound for the final occupancy of the mechanical resonator can be attained by inclusion of the anti-resonance terms in the resolved sideband (RSB) regime. We establish that the self squeezing cavity modes can enhance the cooling in optomechanical cavity. [ABSTRACT FROM AUTHOR]

Using isospin-dependent quantum molecular dynamics (IQMD) model, the role of angular velocity (Wy) has been explored by changing the mass asymmetric content of the colliding nuclei at the incident energy of 50 MeV/nucleon for centrality 0.25