Frequency thermal response and cooling performance in a microscopic system with a time-dependent perturbation.

N.BERAHA; A. SOBA; M.F. CARUSELA

PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 464 p. 64 - 73

0378-4371

Following the nonequilibrium Green´s function formalism we study the thermaltransport in a composite chain subject to a time-dependent perturbation.The system is formed by two nite linear asymmetric harmonic chains subject toan on-site potential connected together by a time-modulated coupling. The endsof the chains are coupled to two phononic reservoirs at dierent temperatures.We present the relevant equations used to calculate the heat current along eachsegment. We nd that the system presents dierent transport regimes accordingthe driving frequency and temperature gradients. One of the regimes correspondsto a heat pump against thermal gradient, thus a characterization of the coolingperformance of the device is presented.