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You searched on: Topic Area: Quantum Physics

Displaying records 21 to 30 of 34 records.
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21. Conclusive quantum steering with superconducting transition-edge sensors
Topic: Quantum Physics
Published: 1/10/2012
Authors: Devin H Smith, Marcelo de Almeida, Gillett Geoff, Branciard Cyril, Allesandro Fedrizzi, Weinhold J Till, Adriana E Lita, Brice R. Calkins, Thomas Gerrits, Wiseman H, Sae Woo Nam, Andrew G White
Abstract: Quantum steering allows two parties to verify shared entanglement even if one measurement device is untrusted. A conclusive demonstration of steering through the violation of a steering inequality is of considerable fundamental interest and opens up ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908855

22. 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 NMN 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

23. Low loss superconducting titanium nitride coplanar waveguide resonators
Topic: Quantum Physics
Published: 12/9/2010
Authors: Michael R Vissers, Jiansong Gao, David S. Wisbey, David P Pappas, C. C. Tsuei, A. D. Corcoles, Matthias Steffen
Abstract: Thin films of TiN were sputter-deposited onto Si and sapphire wafers with and without SiN buffer layers. The films were fabricated into RF coplanar waveguide resonators, and internal quality factor measurements were taken at millikelvin temperatures ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906241

24. 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

25. 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

26. 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

27. 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

28. 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

29. 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

30. Introduction to Journal of Modern Optics Special Issue on Single Photon: Sources, Detectors, Applications and Measurement Methods
Topic: Quantum Physics
Published: 1/20/2007
Authors: J Cheung, Alan L Migdall, Stefania Castelletto
Abstract: In October 2005, a 2-day follow up workshop, Single photon: sources, detectors, applications and measurement methods, was held at the NPL (National Physical Laboratory, UK). The focus for this workshop was to report on the key developments since the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841035



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