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Displaying records 11 to 20 of 25 records.
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11. Bell violation using entangled photons without the fair-sampling assumption
Topic: Quantum Physics
Published: 4/14/2013
Authors: Marissa Giustina, Alexandra Mech, Sven Ramelow, Bernhard Wittman, Johannes Keffler, Joern Beyer, Adriana Eleni Lita, Thomas Gerrits, Sae Woo Nam, Rupert Ursin, Anton Zeilinger, Brice R. Calkins
Abstract: The violation of a Bell inequality is an experimental observation that forces the abandonment of a local realistic viewpoint - namely, one in which physical properties are (probabilistically) defined before and independently of measurement, and in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913494

12. Experimental demonstration of a receiver beating the standard quantum limit for multiple nonorthogonal coherent-state discrimination
Topic: Quantum Physics
Published: 1/6/2013
Authors: Francisco E. Becerra Chavez, Jingyun Fan, Gerald Baumgartner, Julius Goldhar, Jonathan Kosloski, Alan L Migdall
Abstract: The measurement of the state of a quantum system with inherent quantum uncertainty (noise) approaching the ultimate physical limits is of both technological and fundamental interest. Quantum noise prevents any mutually nonorthogonal quantum states ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912063

13. Preface to Proceedings of the International Conference Quantum Theory: Reconsideration of Foundations-6 (QTRF6) held in Vaxjo, Sweden, 11-14 June 2012
Topic: Quantum Physics
Published: 12/18/2012
Authors: Harald Atmanspacher, Andrei Khrennikov, Alan L Migdall, Sergey V Polyakov
Abstract: A wide spectrum of topics was presented in talks at this conference: quantum foundations (especially, Heisenberg's uncertainty relation and its generalizations) and information, mathematical formalism of quantum theory, philosophy, methodology of m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912778

14. Electron Vortex Beams with High Quanta of Orbital Angular Momentum
Topic: Quantum Physics
Published: 1/14/2011
Authors: Benjamin James McMorran, Amit Kumar Agrawal, Ian M. Anderson, Andrew A Herzing, Henri J Lezec, Jabez J McClelland, John Unguris
Abstract: Analogous to vortices in light optical beams, electron optical beams with helical wavefronts carry orbital angular momentum and promise new capabilities for electron microscopy and other applications. We use nanofabricated diffraction holograms in an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906991

15. Preserving quantum coherence using optimized open-loop control techniques
Topic: Quantum Physics
Published: 5/16/2010
Authors: Michael J. Biercuk, Hermann Uys, Aaron Vandevender, Nobuyasu Shiga, Wayne M Itano, John J Bollinger
Abstract: We describe experimental and theoretical studies of open-loop quantum control techniques known as dynamical decoupling (DD) for the suppression of decoherence-induced errors in quantum systems. Our experiments on trapped atomic ion qubits demonstra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903760

16. Mode Expansion and Bragg Filtering Enable a High-Fidelity Fiber-Based Photon-Pair Source
Topic: Quantum Physics
Published: 11/9/2009
Authors: Alexander E. Ling, Jun Chen, Jingyun Fan, Alan L Migdall
Abstract: We report the development of a fiber-based single spatial mode source of photon-pairs where the efficiency of extracting photon-pairs is 15x better than a previous implementation [16]. This critical improvement in efficiency enabled a spectrally bri ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903010

17. Electromagnetically induced transparency in a superconducting three-level system
Topic: Quantum Physics
Published: 4/16/2009
Authors: Mika Sillanpaa, Katarina Cicak, Fabio Altomare, Jae Park, Raymond Wiley Simmonds, Jian Li, G. S. Paraoanu, Pertti Hakonen
Abstract: When a three-level quantum system is irradiated by an intense coupling field resonant with two of the three possible transitions, the resonant absorption of the system from its ground state by an additional radiation field is suppressed. This effec ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902514

18. Improved implementation of the Alicki Van Ryn nonclassicality test for a single particle using Si detectors
Topic: Quantum Physics
Published: 4/15/2009
Authors: Sergey V Polyakov, Alan L Migdall, Giorgio Brida, Ivo Pietro Degiovanni, Marco Genovese, Fabrizio Piacentini, V Schettini, Nicolas Gisin
Abstract: Recently a test of nonclassicality for a single qubit was proposed R. Alicki and N. Van Ryn, J. Phys, A: Math. Theor. 41, 062001 2008. We present an optimized experimental realization of this test leading to a 46standard deviation violation of cl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900940

19. Improved multiplexed Infrared Single Photon Detectors
Topic: Quantum Physics
Published: 8/11/2008
Authors: Sergey V Polyakov, Alan L Migdall, V Schettini, Ivo Pietro Degiovanni, Giorgio Brida, F Piacentini
Abstract: We discuss a scheme for a photon-counting detection system that overcomes the difficulties of photon-counting at high rates at telecom wavelengths. Our method uses an array of N detectors and a 1-by-N optical switch with a control circuit to direct i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842544

20. High Accuracy Verification of a Correlated-Photon-Based Method for Determining Photon-Counting Detection Efficiency
Topic: Quantum Physics
Published: 2/19/2007
Authors: Sergey V Polyakov, Alan L Migdall
Abstract: We have implemented and characterized an independent primary standard method for the calibration of detection efficiency of photon counting detectors. The method is based on a light source producing correlated photon pairs. We have determined, and mo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841045



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