Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2008-10-27
Phys. Rev. Lett. 102, 130603 (2009)
Physics
Condensed Matter
Other Condensed Matter
4 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.102.130603
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 non-oscillatory relaxation dynamics is observed. Furthermore, the corresponding relaxation time exhibits a at the critical point, in contrast to the usual notion of critical slowing down, from which a maximum is expected.
Altman Ehud
Barmettler Peter
Demler Eugene
Gritsev Vladimir
Punk Matthias
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