关键词: 多模激光器/
冷原子/
磁光阱/
光学晶格
English Abstract
One-dimensional far-detuned optical lattice realized with a multimode 1064 nm laser
Yuan Yuan1 2,Lu Xiao-Gang1,
Bai Jin-Hai1,
Li Jian-Jun1,
Wu Ling-An1,
Fu Pan-Ming1,
Wang Ru-Quan1,
Zuo Zhan-Chun1
1.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, China;
2.College of Physics and Information Engineering, Hebei Normal University, Shijiazhuang 050000, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant Nos. 11274376, 61308011, 11204011) and the National Basic Research Program of China (Grant Nos. 2013CB922002, 2010CB922904).Received Date:29 September 2015
Accepted Date:30 November 2015
Published Online:05 February 2016
Abstract:For a quantum memory to be useful as a quantum repeater, a long coherence time is a crucial requirement. In recent years, the most commonly explored medium for quantum storage has been atomic gases. We report an experiment to realize a quantum memory based on an Rb atomic ensemble in a one-dimensional far-detuned optical lattice. A multimode 30 W continuous wave fiber laser was used to construct a travelling wave lattice with a period of 25 m. The Rb atoms were loaded into a magneto-optical-trap, which was then adjusted to optimize the polarization gradient cooling. To trap the cooled atoms, we turned on a laser which has a wavelength of 1064 nm and therefore is red-detuned from the resonance frequencies of D1 and D2 transitions of 87Rb atoms. By taking the short-distance time-of-flight image the temperature of the atoms was found to be about 20 K. This system will provide a foundation for future quantum information storage studies.
Keywords: multimode laser/
cold atoms/
magneto-optical-trap/
optical lattice
