Transport through a quantum critical system: A thermodynamically consistent approach
arXiv:1912.01340 · doi:10.1103/PhysRevResearch.2.023178
Abstract
Currents through quantum systems may probe non-analyticities in quantum-critical many-body ground states. For a large class of dissipative quantum critical systems we show that it is possible to obtain the reduced system dynamics in the vicinity of quantum critical points in a thermodynamically consistent way, while capturing non-Markovian effects. We achieve this by combining reaction coordinate mappings with polaron transforms. Exemplarily, we consider the Lipkin-Meshkov-Glick model in a transport setup, where the quantum phase transition manifests itself in the heat transfer statistics.
arXiv comment5 + 3 pages including Appendix and Ref, 3 figures
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