Tuesday, April 24, 2012

1204.4739 (Kai He et al.)

Initial state dependence of the quench dynamics in integrable quantum
systems II: Thermal state
   [PDF]

Kai He, Marcos Rigol
We study properties of isolated integrable systems after a sudden quench starting from thermal states. We show that, even if the system is initially in thermal equilibrium at finite temperature, the diagonal entropy after a quench remains a fraction of the entropy in thermal equilibrium and in the generalized ensembles introduced to describe integrable systems after relaxation. We also examine the difference between the distribution of conserved quantities in the thermal and generalized ensembles after a quench. A finite size scaling analysis is presented for each quantity, which allows us making predictions for thermodynamically large system sizes.
View original: http://arxiv.org/abs/1204.4739

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