Dynamical Arrest of Ultracold Lattice Fermions

被引：8

作者：

Schmidt, Bernd ^{[1
]}

Bakhtiari, M. Reza ^{[1
,2
]}

Titvinidze, Irakli ^{[1
,2
]}

Schneider, Ulrich ^{[3
]}

Snoek, Michiel ^{[4
]}

Hofstetter, Walter ^{[1
]}

机构：

[1] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

[2] Univ Hamburg, Inst Theoret Phys 1, D-20355 Hamburg, Germany

[3] Univ Munich, Fak Phys, D-80799 Munich, Germany

[4] Univ Amsterdam, Inst Theoret Phys, NL-1090 GL Amsterdam, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 07期

关键词：

OPTICAL LATTICE; HUBBARD-MODEL; MOTT INSULATOR; ATOMS; EXPANSION; PHYSICS;

D O I：

10.1103/PhysRevLett.110.075302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We theoretically investigate the thermodynamics of an interacting inhomogeneous two-component Fermi gas in an optical lattice. Motivated by a recent experiment by L. Hackermuller et al., Science 327, 1621 (2010), we study the effect of the interplay between thermodynamics and strong correlations on the size of the fermionic cloud. We use dynamical mean-field theory to compute the cloud size, which in the experiment shows an anomalous expansion behavior upon increasing attractive interaction. We confirm this qualitative effect but, assuming adiabaticity, we find quantitative agreement only for weak interactions. For strong interactions we observe significant nonequilibrium effects which we attribute to a dynamical arrest of the particles due to increasing correlations. DOI: 10.1103/PhysRevLett.110.075302

引用

页数：5

共 24 条

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