Anomalous Quantum Glass of Bosons in a Random Potential in Two Dimensions

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	Anomalous Quantum Glass of Bosons in a Random Potential in Two Dimensions
	Wang, YC; Guo, WA; Sandvik, AW
刊名	PHYSICAL REVIEW LETTERS
	2015
卷号	114 期号:10 页码:105303
通讯作者	Wang, YC (reprint author), Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China.
英文摘要	We present a quantum Monte Carlo study of the "quantum glass" phase of the two-dimensional Bose-Hubbard model with random potentials at filling rho = 1. In the narrow region between the Mott and superfluid phases, the compressibility has the form kappa similar to exp(-b/T alpha) + c with a < 1 and c vanishing or very small. Thus, at T = 0 the system is either incompressible (a Mott glass) or nearly incompressible (a Mott-glass-like anomalous Bose glass). At stronger disorder, where a glass reappears from the superfluid, we find a conventional highly compressible Bose glass. On a path connecting these states, away from the superfluid at larger Hubbard repulsion, a change of the disorder strength by only 10% changes the low-temperature compressibility by more than 4 orders of magnitude, lending support to two types of glass states separated by a phase transition or a sharp crossover.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
关键词[WOS]	SUPERFLUID-INSULATOR TRANSITION ; MOTT INSULATOR ; SYSTEMS ; LOCALIZATION
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21058]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Wang, YC,Guo, WA,Sandvik, AW. Anomalous Quantum Glass of Bosons in a Random Potential in Two Dimensions[J]. PHYSICAL REVIEW LETTERS,2015,114(10):105303.
APA	Wang, YC,Guo, WA,&Sandvik, AW.(2015).Anomalous Quantum Glass of Bosons in a Random Potential in Two Dimensions.PHYSICAL REVIEW LETTERS,114(10),105303.
MLA	Wang, YC,et al."Anomalous Quantum Glass of Bosons in a Random Potential in Two Dimensions".PHYSICAL REVIEW LETTERS 114.10(2015):105303.