arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0810.3263cond-mat.dis-nncond-mat.supr-con
收藏

Dirty Bosons:20年后

Dirty Bosons: Twenty Years Later

Peter B. Weichman

摘要:

一个简洁的,有点个人的,审查问题的超流性和量子临界性的规则和无序相互作用玻色系统,集中在一般特征和重要的对称性,表现在不同的部分相图,并管理不同的可能类型的临界行为。许多精确的结果,各种绝缘相边界,这可能是用来约束数值模拟的结果,可以得出使用大型稀有区域类型的参数。绝缘体-超流转变的性质是通过一般的标度参数,在一维的精确模型计算,在二维的数值结果,和近似的重整化群的结果在更高的维度。实验He-4吸附在多孔Vycor玻璃,薄膜超导体,和磁捕获原子蒸气在一个周期性的光学势,被用来说明许多的概念。

英文摘要:

A concise, somewhat personal, review of the problem of superfluidity and quantum criticality in regular and disordered interacting Bose systems is given, concentrating on general features and important symmetries that are exhibited in different parts of the phase diagram, and that govern the different possible types of critical behavior. A number of exact results for various insulating phase boundaries, which may be used to constrain the results of numerical simulations, can be derived using large rare region type arguments. The nature of the insulator-superfluid transition is explored through general scaling arguments, exact model calculations in one dimension, numerical results in two dimensions, and approximate renormalization group results in higher dimensions. Experiments on He-4 adsorbed in porous Vycor glass, on thin film superconductors, and magnetically trapped atomic vapors in a periodic optical potential, are used to illustrate many of the concepts.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑