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Steady state quantum transport through an anharmonic oscillator strongly coupled to two heat reservoirs

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arxiv 2004.05017 v3 pith:RVTUEXLC submitted 2020-04-10 cond-mat.quant-gas cond-mat.mes-hallcond-mat.stat-mech

Steady state quantum transport through an anharmonic oscillator strongly coupled to two heat reservoirs

classification cond-mat.quant-gas cond-mat.mes-hallcond-mat.stat-mech
keywords transportanharmonicapproachcoupleddifferentdynamicsoscillatorproperties
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We investigate the transport properties of an anharmonic oscillator, modeled by a single-site Bose-Hubbard model, coupled to two different thermal baths using the numerically exact thermofield based chain-mapping matrix product states (TCMPS) approach. We compare the effectiveness of TCMPS to probe the nonequilibrium dynamics of strongly interacting system irrespective of the system-bath coupling against the global master equation approach in Gorini-Kossakowski-Sudarshan-Lindblad form. We discuss the effect of on-site interactions, temperature bias as well as the system-bath couplings on the steady state transport properties. Last we also show evidence of non-Markovian dynamics by studying the non-monotonicity of the time evolution of the trace distance between two different initial states.

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