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Heralded Single-Magnon Quantum Memory for Photon Polarization States

Author(s)
Simon, Jonathan; Ghosh, Saikat; Vuletic, Vladan; Bloom, Benjamin; Tanji, Haruka
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Abstract
We demonstrate a heralded quantum memory where a photon announces the mapping of a light polarization state onto a single collective-spin excitation (magnon) shared between two atomic ensembles. The magnon can be converted at a later time into a single polarized photon with polarization fidelity over 90(2)% for all fiducial input states, well above the classical limit of 2/3. The process can be viewed as a nondestructive quantum probe where a photon is detected, stored, and regenerated without touching its—potentially undetermined—polarization.
Date issued
2009-07
URI
http://hdl.handle.net/1721.1/51043
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Research Laboratory of Electronics
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Tanji, Haruka et al. “Heralded Single-Magnon Quantum Memory for Photon Polarization States.” Physical Review Letters 103.4 (2009): 043601. (C) 2010 The American Physical Society.
Version: Final published version
ISSN
0031-9007

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