A single-atom quantum memory

Holger P. Specht, Christian Nölleke, Andreas Reiserer, Manuel Uphoff, Eden Figueroa, Stephan Ritter () and Gerhard Rempe
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Holger P. Specht: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1
Christian Nölleke: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1
Andreas Reiserer: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1
Manuel Uphoff: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1
Eden Figueroa: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1
Stephan Ritter: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1
Gerhard Rempe: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1

Nature, 2011, vol. 473, issue 7346, 190-193

Abstract: Single-atom memory Efficient, high-fidelity storage and exchange of quantum information between light and an optical quantum memory is essential for long-distance quantum communication, quantum networking and distributed quantum computing. Stephan Ritter and colleagues demonstrate the most fundamental implementation of such a quantum memory, mapping arbitrary polarization states of light into and out of single atoms trapped inside an optical cavity. The high fidelity (93%) and relatively long qubit coherence time of this atomic memory make it a versatile quantum node, with excellent prospects for applications in optical quantum gates and quantum repeaters.

Date: 2011
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DOI: 10.1038/nature09997

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