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Storage and Retrieval of a Squeezed Vacuum

和仁 本多, Kazuhito Honda, 大輔 赤松, Daisuke Akamatsu, 学 有川, Manabu Arikawa, 圭一郎 秋葉, K. Akiba, 哲史 永塚, Satoshi Nagatsuka, 明 古沢, 崇仁 谷村, 幹男 上妻, Akira Furusawa, 上妻 幹男, Mikio Kozuma

Published Mar 1, 2008• 0 citations
OpenAlex

Abstract

Storage and retrieval of a squeezed vacuum was successfully demonstrated using electromagnetically induced transparency. The squeezed vacuum pulse having a temporal width of 930 ns was incident on the laser cooled 87Rb atoms with an intense control light in a coherent state. When the squeezed vacuum pulse was slowed and spatially compressed in the cold atoms, the control light was switched off. After 3 µs of storage, the control light was switched on again, and the squeezed vacuum was retrieved, as was confirmed using the time-domain homodyne method.

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International Conference on Quantum Information•Jan 1, 2008•0 citations
Storage and retrieval of a squeezed vacuum was successfully demonstrated using electromagnetically induced transparency. The squeezed vacuum pulse having a temporal width of 930 ns was incident on the laser cooled 87Rb atoms with an intense control light in a coherent state. When the squeezed vacuum pulse was slowed and spatially compressed in the cold atoms, the control light was switched off. After 3 µs of storage, the control light was switched on again, and the squeezed vacuum was retrieved, as was confirmed using the time-domain homodyne method.
Storage and retrieval of a squeezed vacuum was successfully demonstrated using electromagnetically induced transparency. The squeezed vacuum pulse having a temporal width of 930 ns was incident on the laser cooled 87Rb atoms with an intense control light in a coherent state. When the squeezed vacuum pulse was slowed and spatially compressed in the cold atoms, the control light was switched off. After 3 mus of storage, the control light was switched on again, and the squeezed vacuum was retrieved, as was confirmed using the time-domain homodyne method.
We have developed a quantum memory that is completely compatible with current quantum information processing for continuous variables of light, where arbitrary frequency sidebands of a squeezed vacuum can be stored and retrieved using bichromatic electromagnetic induced transparency. The 2 MHz sidebands of squeezed vacuum pulses with temporal widths of 470 ns and a squeezing level of -1.78±0.02 dB were stored for 3 μs in laser-cooled 87Rb atoms. Squeezing of -0.44±0.02 dB, which is the highest squeezing reported for a retrieved pulse, was achieved.