Volume 125, Number 6, March 2019
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||03 May 2019|
Exact nonequilibrium dynamics of a thermal chain of rotating Ising spins: Work statistics, heat-resistant quantum criticality and stroboscopic defects
1 Faculty of Science, Kunming University of Science and Technology - Kunming 650093, China
2 State Key Laboratory of Surface Physics and Department of Physics, Fudan University Shanghai, 200433, China
3 Collaborative Innovation Center of Advanced Microstructures, Fudan University - Shanghai 200433, China
Received: 8 January 2019
Accepted: 22 March 2019
The time-periodic driving along an isospectral trajectory may reveal interesting properties of the quantum nonequilibrium dynamics. In order to clarify this possibility, we investigate the work statistics of a thermal Ising chain with rotating spins and the edge singularity in the work distribution. We find that the average work captures both the equilibrium and the nonequilibrium quantum criticalities, which cannot be smoothed out by the thermal fluctuations. The stroboscopic defects are described by the periodic Gibbs ensemble resulting from the time-periodic driving even at finite temperatures.
PACS: 75.10.Pq – Spin chain models / 05.30.Rt – Quantum phase transitions / 03.75.Kk – Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow
© EPLA, 2019
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