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Topic Area: Quantum Physics

Displaying records 21 to 30 of 32 records.
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21. High Fidelity Transport of Trapped-Ion Qubits through an X-Junction Trap Array
Topic: Quantum Physics
Published: 4/17/2009
Authors: Brad Rodney Blakestad, Aaron Vandevender, Christian Ospelkaus, Jason Amini, Joseph Wright Britton, Dietrich G Leibfried, David J Wineland
Abstract: Trapped ions are a useful system for studying the elements of quantum information processing. Simple alogrithms have been demonstrated, but scaling to much larter tasks requires the ability to manipulate many qubits. To achieve this, ions could be di ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901203

22. 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

23. 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

24. DC-SQUID Amplifiers with over 27 GHz of Gain-Bandwidth Product Operated in the 4-8 GHz Frequency Range
Topic: Quantum Physics
Published: 3/2/2009
Authors: Lafe F. Spietz, Kent D Irwin, Jose Alberto Aumentado
Abstract: We describe measurements of the performance of ampli ers in the 4{8 GHz range using DCSQUIDs in a lumped element con guration. We have used quarter wave resonators as input transformers and multipole output transformers to couple microwave power int ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902846

25. 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

26. 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

27. 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

28. Efficient Generation of Correlated Photon Pairs in a Microstructure Fiber
Topic: Quantum Physics
Published: 12/15/2005
Authors: Jingyun Fan, Alan L Migdall, L Wang
Abstract: We report efficient generation of correlated photon pairs through degenerate four-wave mixing in microstructure fibers. With 735.7 nm pump pulses producing conjugate signal (688.5 nm) and idler (789.8 nm) photons in an 1.8 m microstructure fiber, we ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840962

29. Efficient generation of correlated photon pairs in a microstructure fiber
Topic: Quantum Physics
Published: 12/15/2005
Authors: Jingyun Fan, Alan L Migdall, L Wang
Abstract: We report efficient generation of correlated photon pairs through degenerate four-wave mixing in a microstructure fiber. With 735.7 nm pump pulses producing correlated signal (688.5 nm) and idler (789.8 nm) photons in a 1.8 m microstructure fiber, we ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840977

30. Differences Explained in Correlated-Photon Metrology Techniques
Topic: Quantum Physics
Published: 11/1/1999
Author: Alan L Migdall
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104037



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