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11 results on '"Solomos, Nikolaos"'

1. Space QUEST mission proposal: Experimentally testing decoherence due to gravity

Author

Joshi, Siddarth Koduru, Pienaar, Jacques, Ralph, Timothy C., Cacciapuoti, Luigi, McCutcheon, Will, Rarity, John, Giggenbach, Dirk, Lim, Jin Gyu, Makarov, Vadim, Fuentes, Ivette, Scheidl, Thomas, Beckert, Erik, Bourennane, Mohamed, Bruschi, David Edward, Cabello, Adan, Capmany, Jose, Carrasco-Casado, Alberto, Diamanti, Eleni, Duusek, Miloslav, Elser, Dominique, Gulinatti, Angelo, Hadfield, Robert H., Jennewein, Thomas, Kaltenbaek, Rainer, Krainak, Michael A., Lo, Hoi-Kwong, Marquardt, Christoph, Milburn, Gerard, Peev, Momtchil, Poppe, Andreas, Pruneri, Valerio, Renner, Renato, Salomon, Christophe, Skaar, Johannes, Solomos, Nikolaos, Stipčević, Mario, Torres, Juan P., Toyoshima, Morio, Villoresi, Paolo, Walmsley, Ian, Weihs, Gregor, Weinfurter, Harald, Zeilinger, Anton, Żukowski, Marek, and Ursin, Rupert

Subjects
Quantum Physics, General Relativity and Quantum Cosmology
Abstract

Models of quantum systems on curved space-times lack sufficient experimental verification. Some speculative theories suggest that quantum properties, such as entanglement, may exhibit entirely different behavior to purely classical systems. By measuring this effect or lack thereof, we can test the hypotheses behind several such models. For instance, as predicted by Ralph and coworkers [T C Ralph, G J Milburn, and T Downes, Phys. Rev. A, 79(2):22121, 2009, T C Ralph and J Pienaar, New Journal of Physics, 16(8):85008, 2014], a bipartite entangled system could decohere if each particle traversed through a different gravitational field gradient. We propose to study this effect in a ground to space uplink scenario. We extend the above theoretical predictions of Ralph and coworkers and discuss the scientific consequences of detecting/failing to detect the predicted gravitational decoherence. We present a detailed mission design of the European Space Agency's (ESA) Space QUEST (Space - Quantum Entanglement Space Test) mission, and study the feasibility of the mission schema., Comment: 18 pages, 13 figures, included radiation damage to detectors in appendix

Published
2017
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2. Space-QUEST: Experiments with quantum entanglement in space

Author

Ursin, Rupert, Jennewein, Thomas, Kofler, Johannes, Perdigues, Josep M., Cacciapuoti, Luigi, de Matos, Clovis J., Aspelmeyer, Markus, Valencia, Alejandra, Scheidl, Thomas, Fedrizzi, Alessandro, Acin, Antonio, Barbieri, Cesare, Bianco, Giuseppe, Brukner, Caslav, Capmany, Jose, Cova, Sergio, Giggenbach, Dirk, Leeb, Walter, Hadfield, Robert H., Laflamme, Raymond, Lutkenhaus, Norbert, Milburn, Gerard, Peev, Momtchil, Ralph, Timothy, Rarity, John, Renner, Renato, Samain, Etienne, Solomos, Nikolaos, Tittel, Wolfgang, Torres, Juan P., Toyoshima, Morio, Ortigosa-Blanch, Arturo, Pruneri, Valerio, Villoresi, Paolo, Walmsley, Ian, Weihs, Gregor, Weinfurter, Harald, Zukowski, Marek, and Zeilinger, Anton

Subjects
Quantum Physics
Abstract

The European Space Agency (ESA) has supported a range of studies in the field of quantum physics and quantum information science in space for several years, and consequently we have submitted the mission proposal Space-QUEST (Quantum Entanglement for Space Experiments) to the European Life and Physical Sciences in Space Program. We propose to perform space-to-ground quantum communication tests from the International Space Station (ISS). We present the proposed experiments in space as well as the design of a space based quantum communication payload., Comment: 4 pages, 1 figure, accepted for the 59th International Astronautical Congress (IAC) 2008

Published
2008
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5. Space QUEST mission proposal : experimentally testing decoherence due to gravity

Author

Joshi, Siddarth Koduru, Pienaar, Jacques, Ralph, Timothy C., Cacciapuoti, Luigi, McCutcheon, Will, Rarity, John, Giggenbach, Dirk, Lim, Jin Gyu, Makarov, Vadim, Fuentes, Ivette, Scheidl, Thomas, Beckert, Erik, Bourennane, Mohamed, Bruschi, David Edward, Cabello, Adam, Capmany, Jose, Carrasco-Casado, Alberto, Diamanti, Eleni, Dusek, Miloslav, Elser, Dominique, Gulinatti, Angelo, Hadfield, Robert H., Jennewein, Thomas, Kaltenbaek, Rainer, Krainak, Michael A., Lo, Hoi-Kwong, Marquardt, Christoph, Milburn, Gerard, Peev, Momtchil, Poppe, Andreas, Pruneri, Valerio, Renner, Renato, Salomon, Christophe, Skaar, Johannes, Solomos, Nikolaos, Stipcevic, Mario, Torres, Juan P., Toyoshima, Morio, Villoresi, Paolo, Walrnsley, Ian, Weihs, Gregor, Weinfurter, Harald, Zeilinger, Anton, Zukowski, Marek, Ursin, Rupert, Joshi, Siddarth Koduru, Pienaar, Jacques, Ralph, Timothy C., Cacciapuoti, Luigi, McCutcheon, Will, Rarity, John, Giggenbach, Dirk, Lim, Jin Gyu, Makarov, Vadim, Fuentes, Ivette, Scheidl, Thomas, Beckert, Erik, Bourennane, Mohamed, Bruschi, David Edward, Cabello, Adam, Capmany, Jose, Carrasco-Casado, Alberto, Diamanti, Eleni, Dusek, Miloslav, Elser, Dominique, Gulinatti, Angelo, Hadfield, Robert H., Jennewein, Thomas, Kaltenbaek, Rainer, Krainak, Michael A., Lo, Hoi-Kwong, Marquardt, Christoph, Milburn, Gerard, Peev, Momtchil, Poppe, Andreas, Pruneri, Valerio, Renner, Renato, Salomon, Christophe, Skaar, Johannes, Solomos, Nikolaos, Stipcevic, Mario, Torres, Juan P., Toyoshima, Morio, Villoresi, Paolo, Walrnsley, Ian, Weihs, Gregor, Weinfurter, Harald, Zeilinger, Anton, Zukowski, Marek, and Ursin, Rupert

Abstract

Models of quantum systems on curved space-times lack sufficient experimental verification. Some speculative theories suggest that quantum correlations, such as entanglement, may exhibit different behavior to purely classical correlations in curved space. By measuring this effect or lack thereof, we can test the hypotheses behind several such models. For instance, as predicted by Ralph et al [5] and Ralph and Pienaar [1], a bipartite entangled system could decohere if each particle traversed through a different gravitational field gradient. We propose to study this effect in a ground to space uplink scenario. We extend the above theoretical predictions of Ralph and coworkers and discuss the scientific consequences of detecting/failing to detect the predicted gravitational decoherence. We present a detailed mission design of the European Space Agency's Space QUEST (Space-Quantum Entanglement Space Test) mission, and study the feasibility of the mission scheme.

Published
2018
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6. Mining for Observables: A New Challenge in Numerical Relativity

Author

Solomos, Nikolaos H., Shoemaker, Deirdre, Pfeiffer, Harald, Kidder, Larry, Laguna, Pablo, Lindblom, Lee, Scheel, Mark A., Teukolsky, Saul, Solomos, Nikolaos H., Shoemaker, Deirdre, Pfeiffer, Harald, Kidder, Larry, Laguna, Pablo, Lindblom, Lee, Scheel, Mark A., and Teukolsky, Saul

Abstract

One of the motivations behind numerical relativity is to provide gravitational wave signals of compact objects to observers using the new gravitational wave detectors. Yet, because of the complexities involved, no dependable signals of binary-black hole coalescences have been established. The work in this proceedings is motivated by how numerical relativity can be used today to predict robust features in gravitational wave signals of binary black-hole coalescence by making approximations to the full problem. To illustrate this, we present results from evolving a Klein-Gordon equation on a frozen background. The background is set by a sequence of initial data in which the binary is in quasi-equilibrium. We probe the data resulting from the evolution for the transition between the linear and non-linear regimes using oscillations of the black holes as our guide. This information is used to motivate a qualitative picture of the gravitational signal of a black-hole coalescence.

Published
2006

9. Operating a heterogeneous telescope network.

Author

Allan, Alasdair, Bischoff, Karsten, Burgdorf, Martin, Cavanagh, Brad, Christian, Damien, Clay, Neil, Dickens, Rob, Economou, Frossie, Fadavi, Mehri, Frazer, Stephen, Granzer, Thomas, Grosvenor, Sandy, Hessman, Frederic V., Jenness, Tim, Koratkar, Anuradha, Lehner, Matthew, Mottram, Chris, Naylor, Tim, Saunders, Eric S., and Solomos, Nikolaos

Published
2006
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10. Millisecond solar radio bursts in the metric wavelength range

Author

Bojan Vršnak, A. Hillaris, Jasmina Magdalenic, P. Zlobec, and Solomos, Nikolaos

Subjects
Physics, Millisecond, Astrophysics - Solar and Stellar Astrophysics, Wavelength range, Metric (mathematics), FOS: Physical sciences, Time resolution, solar radiation, radio sources, Solar radio, Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Frequency measurements
Abstract

A study and classification of super-short structures (SSSs) recorded during metric type IV bursts is presented. The most important property of SSSs is their duration, at half power ranging from 4-50 ms, what is up to 10 times shorter than spikes at corresponding frequencies. The solar origin of the SSSs is confirmed by one-to-one correspondence between spectral recordings of Artemis-IV1 and high time resolution single frequency measurements of the TSRS2. We have divided the SSSs in the following categories: 1. Broad-Band SSSs: They were partitioned in two subcategories, the SSS-Pulses and Drifting SSSs; 2. Narrow-band: They appear either as Spike-Like SSSs or as Patch-Like SSSs; 3. Complex SSS: They consist of the absorption-emission segments and were morphologically subdivided into Rain-drop Bursts (narrow-band emission head and a broad-band absorption tail) and Blinkers., Comment: Recent Advances in Astronomy and Astrophysics: 7th International Conference of the Hellenic Astronomical Society. AIP Conference Proceedings, Volume 848, pp. 224-228 (2006)

Published
2006

11. Mining for Observables: A New Challenge in Numerical Relativity

Author

Larry Kidder, Lee Lindblom, Harald P. Pfeiffer, Pablo Laguna, Mark A. Scheel, Saul A. Teukolsky, Deirdre Shoemaker, and Solomos, Nikolaos H.

Subjects
Physics, Gravitational time dilation, General Relativity and Quantum Cosmology, Numerical relativity, Theory of relativity, Gravitational-wave observatory, Classical mechanics, Tests of general relativity, General relativity, Astrophysics::High Energy Astrophysical Phenomena, Speed of gravity, Gravitational redshift
Abstract

One of the motivations behind numerical relativity is to provide gravitational wave signals of compact objects to observers using the new gravitational wave detectors. Yet, because of the complexities involved, no dependable signals of binary-black hole coalescences have been established. The work in this proceedings is motivated by how numerical relativity can be used today to predict robust features in gravitational wave signals of binary black-hole coalescence by making approximations to the full problem. To illustrate this, we present results from evolving a Klein-Gordon equation on a frozen background. The background is set by a sequence of initial data in which the binary is in quasi-equilibrium. We probe the data resulting from the evolution for the transition between the linear and non-linear regimes using oscillations of the black holes as our guide. This information is used to motivate a qualitative picture of the gravitational signal of a black-hole coalescence.

Published
2006
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