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You searched on: Topic Area: Quantum Information

Displaying records 11 to 20 of 45 records.
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11. 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, ...

12. Gradient-based stopping rules for maximum-likelihood quantum-state tomography
Topic: Quantum Information
Published: 9/18/2012
Authors: Scott C Glancy, Emanuel H Knill, Mark Girard
Abstract: When performing maximum likelihood quantum state tomography, one must find the quantum state that maximizes the likelihood for observed measurements on identically prepared systems, all having that quantum state. This optimization is usually perform ...

13. M-ary state phase-shift keying discrimination below the homodyne limit
Topic: Quantum Information
Published: 12/22/2011
Authors: Francisco E. 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 ...

14. 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 ...

15. State Discriminiation Signal Nulling Receivers
Topic: Quantum Information
Published: 9/6/2011
Authors: Francisco E. 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 ...

16. Indistinguishability of single photons from dissimilar single-photon sources
Topic: Quantum Information
Published: 6/14/2011
Authors: Sergey V Polyakov, Glenn Scott Solomon, Edward B. (Edward) Flagg, Alan L Migdall, Andreas Muller
Abstract: In quantum mechanics, particles in identical states are indistinguishable, giving rise to effects with no classical analog. For instance, the bosonic nature of light insures that upon interference two indistinguishable photons will coalesce into a s ...

17. 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 ...

18. 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 ...

19. 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

20. The Cooper Pair Transistor
Topic: Quantum Information
Published: 9/17/2010
Author: Jose Alberto Aumentado
Abstract: The Cooper pair transistor (CPT) is a superconducting electrometer that has applications in quantum information as well as fundamental superconductivity studies. Since it operates in a near-dissipationless mode, it has potential as a minimally inva ...

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