Quantum tunneling of ultracold atoms in optical traps

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	Quantum tunneling of ultracold atoms in optical traps
	Wu, JH ; Qi, R ; Ji, AC ; Liu, WM
刊名	FRONTIERS OF PHYSICS
	2014
卷号	9 期号:2 页码:137
关键词	quantum tunneling Josephson effect Landau-Zener tunneling atom-cavity
ISSN号	2095-0462
通讯作者	Wu, JH (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	We review our theoretical advances in quantum tunneling of Bose-Einstein condensates in optical traps and in microcavities. By employing a real physical system, the frequencies of the pseudo Goldstone modes in different phases between two optical traps are studied respectively, which are the crucial feature of the non-Abelian Josephson effect. When the optical lattices are under gravity, we investigate the quantum tunneling in the "Wannier-Stark localization" regime and "Landau-Zener tunneling" regime. We finally get the total decay rate and the rate is valid over the entire range of temperatures. At high temperatures, we show how the decay rate reduces to the appropriate results for the classical thermal activation. At intermediate temperatures, the results of the total decay rate are consistent with the thermally assisted tunneling. At low temperatures, we obtain the pure quantum tunneling ultimately. And we study the alternating-current and direct-current (ac and dc) photonic Josephson effects in two weakly linked microcavities containing ultracold two-level atoms, which allows for direct observation of the effects. This enables new investigations of the effect of many-body physics in strongly coupled atom-cavity systems and provides a strategy for constructing novel interference devices of coherent photons. In addition, we propose the experimental protocols to observe these quantum tunneling of Bose-Einstein condensates.
资助信息	National Key Basic Research Special Foundation of China [2011CB921502, 2012CB821305, 2009CB930701, 2010CB922904]; National Natural Science Foundation of China [10934010, 11228409, 61227902]; National Natural Science Foundation of China-The Research Grants Council [11061160490, 1386-N-HKU748/10]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59086]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wu, JH,Qi, R,Ji, AC,et al. Quantum tunneling of ultracold atoms in optical traps[J]. FRONTIERS OF PHYSICS,2014,9(2):137.
APA	Wu, JH,Qi, R,Ji, AC,&Liu, WM.(2014).Quantum tunneling of ultracold atoms in optical traps.FRONTIERS OF PHYSICS,9(2),137.
MLA	Wu, JH,et al."Quantum tunneling of ultracold atoms in optical traps".FRONTIERS OF PHYSICS 9.2(2014):137.