Dephasing and the steady state in quantum many-particle systems


Journal Article

We discuss relaxation in bosonic and fermionic many-particle systems. For integrable systems, time evolution can cause a dephasing effect, leading for finite subsystems to steady states. We explicitly derive those steady subsystem states and devise sufficient prerequisites for the dephasing to occur. We also find simple scenarios, in which dephasing is ineffective and discuss the dependence on dimensionality and criticality. It follows further that, after a quench of system parameters, entanglement entropy will become extensive. This provides a way of creating strong entanglement in a controlled fashion. © 2008 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Barthel, T; Schollwöck, U

Published Date

  • March 12, 2008

Published In

Volume / Issue

  • 100 / 10

PubMed ID

  • 18352169

Pubmed Central ID

  • 18352169

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/PhysRevLett.100.100601

Citation Source

  • Scopus