On the quantum criticality in the ground and the thermal states of XX model

Details On the quantum criticality in the ground and the thermal states of XX model On the quantum criticality in the ground and the thermal states of XX model

2009-05-19

arxiv.org/abs/0905.3065v1

OSID volume 2-3:16 (2009)

Physics

Quantum Physics

4 pages, 7 figures, Tourn conference, June 25-28, 2008

Scientific paper

We compare the critical behavior of the ground state and the thermal state of the XX model. We analyze the full energy spectrum and the eigenstates to reconstruct the ground state and the thermally excited state. With the solutions, we discuss about several physical properties of the states, which are related to quantum phase transition, in various limits, at zero temperature as well as at a thermal equilibrium.

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