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arXiv · 1112.4733

Bose-Einstein condensate as a quantum memory for a photonic polarization qubit

Stefan Riedl·Matthias Lettner·Christoph Vo·Simon Baur·Gerhard Rempe·Stephan Dürr
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Abstract

A scheme based on electromagnetically induced transparency is used to store light in a Bose-Einstein condensate. In this process, a photonic polarization qubit is stored in atomic Zeeman states. The performance of the storage process is characterized and optimized. The average process fidelity is 1.000 +/- 0.004. For long storage times, temporal fluctuations of the magnetic field reduce this value, yielding a lifetime of the fidelity of 1.1 +/- 0.2 ms. The write-read efficiency of the pulse energy can reach 0.53 +/- 0.05.

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Stefan Riedl, Matthias Lettner, Christoph Vo, Simon Baur, Gerhard Rempe, Stephan Dürr. 2012-02-14. Bose-Einstein condensate as a quantum memory for a photonic polarization qubit. https://doi.org/10.1103/physreva.85.022318

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