Efficient and long-lived quantum memory with cold atoms inside a ring cavity
Quantum memories are regarded as one of the fundamental building blocks of linear-optical quantum computation1 and long-distance quantum communication2. A long-standing goal to realize scalable quantum information processing is to build a long-lived and efficient quantum memory. There have been sign...
Gespeichert in:
| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
20 May 2012
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| In: |
Nature physics
Year: 2012, Jahrgang: 8, Heft: 7, Pages: 517-521 |
| ISSN: | 1745-2481 |
| DOI: | 10.1038/nphys2324 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1038/nphys2324 Verlag, Volltext: https://www.nature.com/articles/nphys2324 
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| Verfasserangaben: | Xiao-Hui Bao, Andreas Reingruber, Peter Dietrich, Jun Rui, Alexander Dück, Thorsten Strassel, Li Li, Nai-Le Liu, Bo Zhao and Jian-Wei Pan |
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| 520 | |a Quantum memories are regarded as one of the fundamental building blocks of linear-optical quantum computation1 and long-distance quantum communication2. A long-standing goal to realize scalable quantum information processing is to build a long-lived and efficient quantum memory. There have been significant efforts distributed towards this goal. However, either efficient but short-lived3,4 or long-lived but inefficient quantum memories5,6,7 have been demonstrated so far. Here we report a high-performance quantum memory in which long lifetime and high retrieval efficiency meet for the first time. By placing a ring cavity around an atomic ensemble, employing a pair of clock states, creating a long-wavelength spin wave and arranging the set-up in the gravitational direction, we realize a quantum memory with an intrinsic spin wave to photon conversion efficiency of 73(2)% together with a storage lifetime of 3.2(1) ms. This realization provides an essential tool towards scalable linear-optical quantum information processing. | ||
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