Search

Your search keyword '"Matta, Cherif F."' showing total 7 results
Start Over Author "Matta, Cherif F." Database OpenAIRE
7 results on '"Matta, Cherif F."'

1. Quantum Crystallography N-Representability

Author

Matta, Cherif F., Huang, Lulu, and Massa, Lou

Subjects
Quantum Physics, Quantitative Biology - Biomolecules, FOS: Biological sciences, FOS: Physical sciences, Biomolecules (q-bio.BM), Quantum Physics (quant-ph)
Abstract

Linus Pauling contributions span structural biology, chemistry in its broadest definition, quantum mechanical theory, valence bond theory, and even nuclear physics. A principal tool developed and used by Pauling is Xray, and electron, diffraction. One possible extension of the Pauling oeuvre could be the marriage of crystallography and quantum mechanics. Such an effort dates back to the sixties and has now flourished into an entire subfield termed quantum crystallography. Quantum crystallography could be achieved through the application of Clinton equations to yield N-representable density matrices consistent with experimental data. The implementation of the Clinton equations is qualitatively different for small and for large systems. For a small system, quantum mechanics is extracted from Xray data while for a large system, the quantum mechanics is injected into the system. In both cases, Nrepresentability is imposed by the use of the Clinton equations., 20 pages, 3 figures

Published
2021

2. Quantum Crystallography: Projectors and kernel subspaces preserving N-representability

Author

Matta, Cherif F. and Massa, Lou

Subjects
Quantum Physics, Quantitative Biology - Biomolecules, FOS: Biological sciences, FOS: Physical sciences, Biomolecules (q-bio.BM), Quantum Physics (quant-ph)
Abstract

Consider a projector matrix P, representing the first order reduced density matrix in a basis of orthonormal atom-centric basis functions. A mathematical question arises, and that is, how to break P into its natural component kernel projector matrices, while preserving N-representability of P. The answer relies upon 2- projector triple products, P'jPP'j. The triple product solutions, applicable within the quantum crystallography of large molecules, are determined by a new form of the Clinton equations, which - in their original form - have long been used to ensure N-representability of density matrices consistent with X-ray diffraction scattering factors.

Published
2021

3. Research Topic 'Proton Transfer Processes in Biological Reactions: A Computational Approach' Frontiers in Chemistry journal

Author

Ol'ha O Brovarets, Hovorun, Dmytro Mykolayovych, Matta, Cherif F., Pérez-Sánchez, Horacio, Srivastava, Ruby, Ramírez, Víctor Hugo San Martín, Dr. Mohamed Mohamed Tolba Said, S. Tolosa Arroyo, Ashqer, Issam, Hidalgo, Antonio, Saade Abdalkareem Jasim, Saadoun Salimi, Sandipan Chakraborty, Sergienko, Ruslan, Bresam, Sabah, S. Feroz, S. Thamotharan, Meteab, Waleed Younus, Nishanbaev, Sabir, Chalanchi, Saber Mohammadi, S. M. Gorbatyuk, Sabnam S. Ullah, Sonne, Christian, Chebbi, Sabrine, Sadiq Kadhem Abidali, Saeid Ebrahimi, S. Askarian, S. Karimi, Sahli Youcef, Sahnawaz Alam, Zakaria, Saif Khalid, Banihani, Saleem Ali, Salifu Osman, Saiu, Salvatore, Almufti, Saman M., Sanat Ghosh, Sandor G Vari, Wategaonkar, Sanjay, Sarabjeet Kaur, Saranya Vasudevan, Santhosh George, Saravanan Kandasamy, Mamilov, Serge, Seada Hussen, Khomyak, Semen, Gaouar, Semir Bechir Suheil, Senapathy Marisennayya, Balci, Serdar, Kulikov, Sergey B., Leble, Sergey, Marchenko, Sergey, Ivanov, Sergey P, Burian, Sergii, Pustovit, Sergii, Vernygorodskyi, Sergii, Durand, Sergio, Sousa, Sérgio F., Okovytyy, Sergiy I, Senchurov, Sergiy, Dubovyk, Serhii, Holota, Serhii, Vasylevskyi, Serhii I., Blavatskyy, Serhiy, Vakal, Serhii, Shaden Khalifa, Shaaban Saad Elnesr, Shaden M H Mubarak, Rampino, Sergio, Shadrack Katuu, Stepanian, Stepan G., Rohman, Shahnaz, Portukhay, Sofiya, Evangelisti, Luca, Zand, Mohammad Reza Ahmadi, Wensheng Bian, De-Melo, Adriane Alexandre Machado, Hongduo Cao, González, Francisco Martínez, Oliynyk, Timothy, Tiwari, Ekta, Tiezza, Marco Dalla, Nguyen Tien Trung, To, Takahiro, Martínez-Araya, Jorge Ignacio, Vilanova-Costa, Cesar Augusto Sam Tiago, Martínez-Calderon, Miguel, Ortigosa, Pilar Martínez, Zerrouki, Toufik, Małgorzata Kiełczykowska, Lozovaya, Natalia, Zhyganiuk, Igor Viktorovich, Kouzari, Katerina, Małgorzata Gniewosz, Hudz, Nataliia, Moghani, Maryam Zeraati, Battino, Maurizio, Batista, Patrick Rodrigues, Ivashkiv, Iryna, Mashhour, Omar Farouk Al, Waggas Galib Atshan, Slman, Wafaa Jasim, Changwei Wang, Guendouzi Abdelkrim, G.E. Marin, Demo, Gabriel, Silva, Gabriel Da, Silva, Gabrielle, Zaychenko, Ganna, Gabrielis Kundrotas, Merino, Gabriel, Sobczyk, Garret Eugene, Gehan A Hegazy, Boyd, Georgina, Smaisim, Ghassan Fadhil, Mol, Gilbert Pushpam Sheeja, Ribaudo, Giovanni, Lorenzo, Giuseppe De, Skorobagatko, Gleb A., Baryshnikov, Gleb, Gokhan Torun, and Torun, Gökhan

Published
2020
Full Text
View/download PDF

4. Anionic hydrogen clusters as a source of diffuse interstellar bands (DIBs)

Author

Huang, Lulu, Matta, Cherif F., Majaess, Daniel, Harriott, Tina, Capitani, Joseph, and Massa, Lou

Subjects
Chemical Physics (physics.chem-ph), Physics - Chemical Physics, Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - Astrophysics of Galaxies, Astrophysics::Galaxy Astrophysics
Abstract

The sources behind numerous key diffuse interstellar bands (DIBs) remain elusive, and thus evidence is presented here that a family of seven anionic hydrogen atomic clusters (H(-)2n+1, n = 1 to 7) are pertinent contributors. Configuration interaction calculations show hat these charge-induced dipole clusters are stable at temperatures characteristic of the interstellar medium, and emerge from the most abundant element in the Universe. The clusters' spectra yield 25 absorption optical lines that align with observed DIBs to within the computational uncertainties. The absorption bands are due to excitations from the ground states of the clusters to metastable states., Comment: 20 pages in total including 3 figures, 3 tables, and Supporting Information

Published
2019
Full Text
View/download PDF

5. Public Lecture Prof. Chérif F. Matta Department of Chemistry & Physics Mount Saint Vincent University, Canada. «The Kidney, the Mitochondrion, and Maxwell Demon – An Information Theoretic Investigation of Molecular Motors Thermodynamic Efficiency» on November 7, 2018 at the Institute of High Technologies, Taras Shevchenko National University of Kyiv http://iht.univ.kiev.ua/2018/11/02/naukovyi-seminar-ivt-2

Author

Matta, Cherif F., Ol'ha O Brovarets, Voiteshenko, Ivan S., Tsiupa, Kostiantyn S., and Hovorun, Dmytro Mykolayovych

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results