Relaxation of antiferromagnetic order in spin-1/2 chains following a quantum quench.
- Barmettler P Department of Physics, University of Fribourg, CH-1700 Fribourg, Switzerland.
- Punk M
- Gritsev V
- Demler E
- Altman E
- 2009-04-28
Published in:
- Physical review letters. - 2009
English
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.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.102.130603
- PMID 19392341
- Persistent URL
- https://sonar.ch/global/documents/93386
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