This paper considers thermal transport between two reservoirs coupled by a quantum Ising chain, as a model for non-equilibrium physics induced in quantum-critical many-body systems. By deriving rate equations from exact expressions for the quasiparticle pairs generated during transport, it finds signatures of the underlying quantum phase transition in the steady-state energy current, visible even at finite reservoir temperatures.
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- Authors: Malte Vogl, Gernot Schaller, and Tobias Brandes
- Journal: Physical Review Letters 109, 240402 (2012)
- DOI: 10.1103/physrevlett.109.240402