Dynamics of a quantum phase transition

被引:651
作者
Zurek, WH
Dorner, U
Zoller, P
机构
[1] Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA
[2] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England
[3] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria
[4] Austrian Acad Sci, Inst Quantum Opt & Quantum Informat, A-6020 Innsbruck, Austria
关键词
D O I
10.1103/PhysRevLett.95.105701
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present two approaches to the dynamics of a quench-induced phase transition in the quantum Ising model. One follows the standard treatment of thermodynamic second order phase transitions but applies it to the quantum phase transitions. The other approach is quantum, and uses Landau-Zener formula for transition probabilities in avoided level crossings. We show that predictions of the two approaches of how the density of defects scales with the quench rate are compatible, and discuss the ensuing insights into the dynamics of quantum phase transitions.
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页数:4
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