期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.130603
关键词
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资金
- SNF [DFG-FOR 801]
- Feinberg Graduate School
- Israel Binational Science Foundation
- AFOSR
- CUA
- DARPA
- MURI
- NSF [DMR-0705472]
We study the unitary time evolution of antiferromagnetic order in anisotropic Heisenberg chains that are initially prepared in a pure quantum state far from equilibrium. Our analysis indicates that the antiferromagnetic order imprinted in the initial state vanishes exponentially. Depending on the anisotropy parameter, oscillatory or nonoscillatory relaxation dynamics is observed. Furthermore, the corresponding relaxation time exhibits a minimum at the critical point, in contrast to the usual notion of critical slowing down, from which a maximum is expected.
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