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Quantum Criticality of Ground and Thermal States in XX Model

Abstract:
Here, we compare the critical behaviour of the ground state and the thermal state of the XX model. We analyze full energy spectra and the exact form of eigenstates to reconstruct the ground state and the thermally excited state. With the solutions, we discuss the properties of quantum phase transition at zero temperature as well as the state in a thermal equilibrium. © 2009 World Scientific Publishing Company.
Publication status:
Published

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Publisher copy:
10.1142/S1230161209000219

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Role:
Author
Host title:
OPEN SYSTEMS and INFORMATION DYNAMICS
Volume:
16
Issue:
2-3
Pages:
281-286
Publication date:
2009-09-01
DOI:
EISSN:
1793-7191
ISSN:
1230-1612
Pubs id:
pubs:158537
UUID:
uuid:f69cb5ad-2519-4225-8250-b07693e9c870
Local pid:
pubs:158537
Source identifiers:
158537
Deposit date:
2012-12-19

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