Quantum phase transitions for two coupled cavities with dipole-interaction atoms

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	Quantum phase transitions for two coupled cavities with dipole-interaction atoms
	Tan, L ; Zhang, YQ ; liu, WM
刊名	PHYSICAL REVIEW A
	2011
卷号	84 期号:6
关键词	MANY-BODY PHENOMENA OPTICAL LATTICES POLAR-MOLECULES MOTT INSULATOR ARRAYS GAS SYSTEM
ISSN号	1050-2947
通讯作者	Tan, L (reprint author), Lanzhou Univ, Inst Theoret Phys, Lanzhou 730000, Peoples R China.
中文摘要	We investigate the quantum phase transitions for two weakly coupled atom-cavity sites. The interatomic dipole-dipole interaction is considered. Our numerical results show that the dipole-dipole interaction is a crucial parameter for the quantum phase transition. For small atom-cavity detuning, the "superfluid" becomes more and more obvious with the increase of the dipole-dipole interaction. In addition, the strong dipole-dipole interaction can lead the atomic excitation to be suppressed completely, and only the photonic excitation exists for the ground states. When the atom-cavity detuning is comparable with the dipole-dipole interaction, the dipole-dipole interaction enlarges the positive detunings, which is in favor of exhibiting superfluid photonic states. While for the negative detuning, the dipole-dipole interaction will reduce it, and contribute to the formation of the polaritonic insulator states. The cases for extended models have also been briefly analyzed. We also discuss how to find these novel phenomena in future experiments.
收录类别	SCI
资助信息	NSFC [10704031, 10874235, 10934010, 60978019]; NKBRSFC [2009CB930701, 2010CB922904, 2011CB921500]; FRFCU [lzujbky-2010-75]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/51716]
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	Tan, L,Zhang, YQ,liu, WM. Quantum phase transitions for two coupled cavities with dipole-interaction atoms[J]. PHYSICAL REVIEW A,2011,84(6).
APA	Tan, L,Zhang, YQ,&liu, WM.(2011).Quantum phase transitions for two coupled cavities with dipole-interaction atoms.PHYSICAL REVIEW A,84(6).
MLA	Tan, L,et al."Quantum phase transitions for two coupled cavities with dipole-interaction atoms".PHYSICAL REVIEW A 84.6(2011).