Efficient and long-lived quantum memory with cold atoms inside a ring cavity

• Verfasst von: Bao, Xiao-Hui [VerfasserIn]
• Verfasst von: Reingruber, Andreas [VerfasserIn]
• Verfasst von: Dietrich, Peter [VerfasserIn]
• Verfasst von: Dück, Alexander [VerfasserIn]
• Verfasst von: Straßel, Thorsten [VerfasserIn]
• Verfasst von: Pan, Jian-Wei [VerfasserIn]
• Titel: Efficient and long-lived quantum memory with cold atoms inside a ring cavity
• Verf.angabe: Xiao-Hui Bao, Andreas Reingruber, Peter Dietrich, Jun Rui, Alexander Dück, Thorsten Strassel, Li Li, Nai-Le Liu, Bo Zhao and Jian-Wei Pan
• E-Jahr: 2012
• Jahr: 20 May 2012
• Umfang: 5 S.
• Fussnoten: Gesehen am 28.09.2018
• Titel Quelle: Enthalten in: Nature physics
• Ort Quelle: Basingstoke : Nature Publishing Group, 2005
• Jahr Quelle: 2012
• Band/Heft Quelle: 8(2012), 7, Seite 517-521
• ISSN Quelle: 1745-2481
• DOI: doi:10.1038/nphys2324
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1581403984

Abstract

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.