Quantum Simulation of Frustrated Classical Magnetism in Triangular Optical Lattices

被引：569

作者：

Struck, J. ^{[1
]}

Oelschlaeger, C. ^{[1
]}

Le Targat, R. ^{[1
]}

Soltan-Panahi, P. ^{[1
]}

Eckardt, A. ^{[2
]}

Lewenstein, M. ^{[2
,3
]}

Windpassinger, P. ^{[1
]}

Sengstock, K. ^{[1
]}

机构：

[1] Univ Hamburg, Inst Laser Phys, D-22761 Hamburg, Germany

[2] Inst Ciencies Foton, E-08860 Barcelona, Spain

[3] Inst Catalana Ric & Estudis Avancats, E-08010 Barcelona, Spain

来源：

SCIENCE | 2011年 / 333卷 / 6045期

基金：

欧洲研究理事会;

关键词：

ULTRACOLD ATOMS; PHYSICS; ICE; GASES;

D O I：

10.1126/science.1207239

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：

Magnetism plays a key role in modern technology and stimulates research in several branches of condensed matter physics. Although the theory of classical magnetism is well developed, the demonstration of a widely tunable experimental system has remained an elusive goal. Here, we present the realization of a large-scale simulator for classical magnetism on a triangular lattice by exploiting the particular properties of a quantum system. We use the motional degrees of freedom of atoms trapped in an optical lattice to simulate a large variety of magnetic phases: ferromagnetic, antiferromagnetic, and even frustrated spin configurations. A rich phase diagram is revealed with different types of phase transitions. Our results provide a route to study highly debated phases like spin-liquids as well as the dynamics of quantum phase transitions.

引用

页码：996 / 999

页数：4

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