Malte Vogl, Gernot Schaller, Tobias Brandes
Published 2012-08-29, updated 2012-11-12Version 2
We consider 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 based on exact expressions for the quasiparticle pairs generated during the transport, we observe signatures of the underlying quantum phase transition in the steady-state energy current already at finite reservoir temperatures.
Comments: to appear in PRL
Journal: Physical Review Letters 109, 240402 (2012)
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