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Title: Single-passage readout of atomic quantum memory

Abstract

A scheme for retrieving quantum information stored in collective atomic spin systems onto optical pulses is presented. Two off-resonant light pulses cross the atomic medium in two orthogonal directions and are interferometrically recombined in such a way that one of the outputs carries most of the information stored in the medium. In contrast to previous schemes our approach requires neither multiple passes through the medium nor feedback on the light after passing the sample, which makes the scheme very efficient. The price for that is some added noise which is, however, small enough for the method to beat the classical limits.

Authors:
 [1];  [2];  [3];  [4];  [2]
  1. Department of Optics, Palacky University, 17. listopadu 50, 77200 Olomouc (Czech Republic)
  2. QUANTOP, Danish National Research Foundation Center for Quantum Optics, Niels Bohr Institute, Copenhagen University, Blegdamsvej 17, 2100 Copenhagen O (Denmark)
  3. (Denmark)
  4. Department of Theoretical Physics, Palacky University, 17. listopadu 50, 77200 Olomouc (Czech Republic)
Publication Date:
OSTI Identifier:
20974547
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.73.022331; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; MEMORY MANAGEMENT; QUANTUM COMPUTERS; QUANTUM INFORMATION; QUANTUM MECHANICS; QUBITS; SPIN

Citation Formats

Fiurasek, J., Sherson, J., Department of Physics and Astronomy, University of Aarhus, DK 8000 Aarhus C, Opatrny, T., and Polzik, E. S. Single-passage readout of atomic quantum memory. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.022331.
Fiurasek, J., Sherson, J., Department of Physics and Astronomy, University of Aarhus, DK 8000 Aarhus C, Opatrny, T., & Polzik, E. S. Single-passage readout of atomic quantum memory. United States. doi:10.1103/PHYSREVA.73.022331.
Fiurasek, J., Sherson, J., Department of Physics and Astronomy, University of Aarhus, DK 8000 Aarhus C, Opatrny, T., and Polzik, E. S. Wed . "Single-passage readout of atomic quantum memory". United States. doi:10.1103/PHYSREVA.73.022331.
@article{osti_20974547,
title = {Single-passage readout of atomic quantum memory},
author = {Fiurasek, J. and Sherson, J. and Department of Physics and Astronomy, University of Aarhus, DK 8000 Aarhus C and Opatrny, T. and Polzik, E. S.},
abstractNote = {A scheme for retrieving quantum information stored in collective atomic spin systems onto optical pulses is presented. Two off-resonant light pulses cross the atomic medium in two orthogonal directions and are interferometrically recombined in such a way that one of the outputs carries most of the information stored in the medium. In contrast to previous schemes our approach requires neither multiple passes through the medium nor feedback on the light after passing the sample, which makes the scheme very efficient. The price for that is some added noise which is, however, small enough for the method to beat the classical limits.},
doi = {10.1103/PHYSREVA.73.022331},
journal = {Physical Review. A},
number = 2,
volume = 73,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}