Energy spectrum of ground state and excitation spectrum of quasi-particle for hard-core boson in optical lattices

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 量子光学重点实验室

	Energy spectrum of ground state and excitation spectrum of quasi-particle for hard-core boson in optical lattices
	Han JR ; Zhang HC ; Wang YZ
刊名	commun. theor. phys.
	2005
卷号	44 期号:5 页码:863
关键词	hard-core boson energy spectrum excitation spectrum optical lattices
ISSN号	0253-6102
中文摘要	we investigate the energy spectrum of ground state and quasi-particle excitation spectrum of hard-core bosons, which behave very much like spinless noninteracting fermions, in optical lattices by means of the perturbation expansion and bogoliubov approach. the results show that the energy spectrum has a single band structure, and the energy is lower near zero momentum; the excitation spectrum gives corresponding energy gap, and the system is in mott-insulating state at tonks limit. the analytic result of energy spectrum is in good agreement with that calculated in terms of green's function at strong correlation limit.
学科主题	光学;量子光学
收录类别	0
语种	英语
WOS记录号	WOS:000233657100021
公开日期	2009-09-18
内容类型	期刊论文
源URL	[http://ir.siom.ac.cn/handle/181231/1183]
专题	上海光学精密机械研究所_量子光学重点实验室
推荐引用方式 GB/T 7714	Han JR,Zhang HC,Wang YZ. Energy spectrum of ground state and excitation spectrum of quasi-particle for hard-core boson in optical lattices[J]. commun. theor. phys.,2005,44(5):863, 866.
APA	Han JR,Zhang HC,&Wang YZ.(2005).Energy spectrum of ground state and excitation spectrum of quasi-particle for hard-core boson in optical lattices.commun. theor. phys.,44(5),863.
MLA	Han JR,et al."Energy spectrum of ground state and excitation spectrum of quasi-particle for hard-core boson in optical lattices".commun. theor. phys. 44.5(2005):863.