期刊
PHYSICAL REVIEW D
卷 92, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.92.034519
关键词
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资金
- EU through SIQS Grant [FP7 600645]
- DFG Sonderforschungsbereich/Transregio Grant [SFB/TR9]
- Helmholtz International Center for FAIR within the framework of the LOEWE program
- Japan Society for the Promotion of Science for Young Scientists
We demonstrate the suitability of tensor network techniques for describing the thermal evolution of lattice gauge theories. As a benchmark case, we have studied the temperature dependence of the chiral condensate in the Schwinger model, using matrix product operators to approximate the thermal equilibrium states for finite system sizes with nonzero lattice spacings. We show how these techniques allow for reliable extrapolations in bond dimension, step width, system size and lattice spacing, and for a systematic estimation and control of all error sources involved in the calculation. The reached values of the lattice spacing are small enough to capture the most challenging region of high temperatures and the final results are consistent with the analytical prediction by Sachs and Wipf over a broad temperature range.
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