Heralded atomic-ensemble quantum memory for photon polarization states

Author(s)
Tanji, Haruka; Simon, Jonathan; Ghosh, Saikat; Bloom, Benjamin; Vuletic, Vladan
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Abstract
We describe the mapping of quantum states between single photons and an atomic ensemble. In particular, we demonstrate a heralded quantum memory based on the mapping of a photon polarization state onto a single collective-spin excitation (magnon) shared between two atomic ensembles. The polarization fidelity above 90(2)% for any input polarization far exceeds the classical limit of \frac{2}{3} . The process also constitutes a quantum non-destructive probe that detects and regenerates a photon without measuring its polarization.
Date issued
2009-07
URI
http://hdl.handle.net/1721.1/51800
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; MIT-Harvard Center for Ultracold Atoms
Journal
Physica Scripta
Publisher
Royal Swedish Academy of Sciences
Citation
Tanji, Haruka et al. “Heralded atomic-ensemble quantum memory for photon polarization states.” Physica Scripta T135 (2009): 014010.
Version: Author's final manuscript
ISSN
0031-8949
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