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Topic Area: Quantum Information

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1. Experimental demonstration of a receiver beating the standard quantum limit for multiple nonorthogonal coherent-state discrimination
Topic: Quantum Information
Published: 1/6/2013
Authors: Francisco Elohim 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://nist.gov/manuscript-publication-search.cfm?pub_id=912063

2. Quantum Tomography via Compressed Sensing: Error Bounds, Sample Complexity, and Efficient Estimators
Topic: Quantum Information
Published: 9/27/2012
Authors: Yi-Kai Liu, Steven T. Flammia, David Gross, Jens Eisert
Abstract: Intuitively, if a density operator has small rank, then it should be easier to estimate from experimental data, since in this case only a few eigenvectors need to be learned. We prove two complementary results that confirm this intuition. First, ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=911441

3. M-ary state phase-shift keying discrimination below the homodyne limit
Topic: Quantum Information
Published: 12/22/2011
Authors: Francisco Elohim Becerra Chavez, Jingyun Fan, Gerald Baumgartner, Sergey V Polyakov, Julius Goldhar, Jonathan Kosloski, Alan L Migdall
Abstract: We investigate a strategy for M-ary discrimination of nonorthogonal phase states with error rates below the homodyne limit. This strategy uses feed forward to update a reference field and Signal nulling for the state discriminati ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=908874

4. Multi-Spatial-Mode Single-Beam Quadrature Squeezed States of Light from Four-Wave Mixing in Hot Rubidium Vapor
Topic: Quantum Information
Published: 10/24/2011
Authors: Neil V. (Neil Vladimir) Corzo Trejo, Alberto Manuel Marino, Kevin M. Jones, Paul D Lett
Abstract: We present experimental results on the generation of multi-spatial-mode, single-beam, quadrature squeezed light using four-wave mixing in hot Rb vapor. Squeezing and phase-sensitive deamplification are observed over a range of powers and detunings ne ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=909323

5. State Discriminiation Signal Nulling Receivers
Topic: Quantum Information
Published: 9/6/2011
Authors: Francisco Elohim Becerra Chavez, Jingyun Fan, Gerald Baumgartner, Sergey V Polyakov, Julius Goldhar, Jonathan Kosloski, Alan L Migdall
Abstract: Optimized state-discrimination receiver strategies for nonorthogonal states can improve the capacity of the communication channels operating with error rates below the ones corresponding to conventional receivers. Coherent signal-nulling receivers us ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=909465

6. Quantum information processing and metrology with trapped ions
Topic: Quantum Information
Published: 1/25/2011
Authors: David J Wineland, Dietrich G Leibfried
Abstract: The use of trapped atomic ions in the field of quantum information processing is briefly reviewed. We summarize the basic mechanisms required for logic gates and the use of the gates in demonstrating simple algorithms. We discuss the potential of tra ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=906237

7. Frequency-bin Entangled Comb of Photon Pairs From a Silicon-on-Insulator Micro-Resonator
Topic: Quantum Information
Published: 1/13/2011
Authors: Jun Chen, Zachary H Levine, Jingyun Fan, Alan L Migdall
Abstract: We present a quantum-mechanical theory to describe narrow-band photon- pair generation via four-wave mixing in a Silicon-on-Insulator (SOI) micro- resonator. We also provide design principles for efficient photon-pair generation in an SOI mic ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=906297

8. Randomized Benchmarking of Atomic Qubits in an Optical Lattice
Topic: Quantum Information
Published: 11/4/2010
Authors: Steven M Olmschenk, Radu S. Chicireanu, Karl D. Nelson, James V Porto
Abstract: We perform randomized benchmarking on neutral atomic quantum bits (qubits) confined in an optical lattice. Single qubit gates are implemented using microwaves, resulting in a measured error per randomized computational gate of 1.4(1) x 10−4 tha ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=906248

9. Quantum Transduction of Telecommunications-band Single Photons from a Quantum Dot by Frequency Upconversion
Topic: Quantum Information
Published: 10/3/2010
Authors: Matthew T. Rakher, Lijun Ma, Oliver T Slattery, Xiao Tang, Kartik A Srinivasan
http://nist.gov/manuscript-publication-search.cfm?pub_id=905469

10. Relativity and Optical Clocks
Topic: Quantum Information
Published: 9/24/2010
Authors: Chin W. Chou, David Hume, Till P Rosenband, David J Wineland
Abstract: Albert Einstein's theory of relativity forced us to alter our concepts of reality. One of the more startling outcomes of the theory is that we have to give up our notions of simultaneity. This is manifest in the so-called twin paradox in which a twin ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=905055