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题名: Anomalous Quantum Glass of Bosons in a Random Potential in Two Dimensions
作者: Wang, YC;  Guo, WA;  Sandvik, AW
刊名: PHYSICAL REVIEW LETTERS
出版日期: 2015
卷号: 114, 期号:10, 页码:105303
学科分类: Physics
DOI: http://dx.doi.org/10.1103/PhysRevLett.114.105303
通讯作者: Wang, YC (reprint author), Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China.
文章类型: Article
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.
类目[WOS]: Physics, Multidisciplinary
关键词[WOS]: SUPERFLUID-INSULATOR TRANSITION ;  MOTT INSULATOR ;  SYSTEMS ;  LOCALIZATION
收录类别: SCI
项目资助者: NSFC [11175018] ;  NSF [DMR-1104708, DMR-1410126]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21058
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
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.
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