Anomalous Expansion of Attractively Interacting Fermionic Atoms in an Optical Lattice

被引：79

作者：

Hackermueller, Lucia ^{[1
]}

Schneider, Ulrich ^{[1
,2
]}

Moreno-Cardoner, Maria ^{[1
,2
]}

Kitagawa, Takuya ^{[3
]}

Best, Thorsten ^{[1
]}

Will, Sebastian ^{[1
,2
]}

Demler, Eugene ^{[3
]}

Altman, Ehud ^{[4
]}

Bloch, Immanuel ^{[1
,2
,5
]}

Paredes, Belen ^{[1
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[2] Univ Munich, D-80799 Munich, Germany

[3] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[4] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

[5] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

来源：

SCIENCE | 2010年 / 327卷 / 5973期

基金：

英国工程与自然科学研究理事会;

关键词：

HUBBARD-MODEL; MOTT INSULATOR; PHYSICS; GASES; SUPERCONDUCTIVITY;

D O I：

10.1126/science.1184565

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The interplay of thermodynamics and quantum correlations can give rise to counterintuitive phenomena in many-body systems. We report on an isentropic effect in a spin mixture of attractively interacting fermionic atoms in an optical lattice. As we adiabatically increase the attraction between the atoms, we observe that the gas expands instead of contracting. This unexpected behavior demonstrates the crucial role of the lattice potential in the thermodynamics of the fermionic Hubbard model.

引用

页码：1621 / 1624

页数：4

共 27 条

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Auerbach A., 2006, Interacting Electrons and Quantum Magnetism

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