Quantum Criticality of Ground and Thermal States in XX Model

Conference item

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.

Authors: Son, W; Vedral, V

• Publication status: Published
• Host title: OPEN SYSTEMS and INFORMATION DYNAMICS
• Volume: 16
• Issue: 2-3
• Pages: 281-286
• Publication date: 2009-09-01
• DOI: 10.1142/S1230161209000219
• EISSN: 1793-7191
• ISSN: 1230-1612