title: Transient heat generation in a quantum dot under a step-like pulse bias.
abstract: We study the transient heat generation in a quantum dot system driven by a step-like or a square-shaped pulse bias. We find that a periodically oscillating heat generation arises after adding the sudden bias. One particularly surprising result is that there exists a heat absorption from the zero-temperature phonon subsystem. Thus the phonon population in non-equilibrium can be less than that of the equilibrium electron-phonon system. In addition, we also ascertain the optimal conditions for the operation of a quantum dot with the minimum heat generation.
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Pei
authors.forename: X C
authors.initials: XC
authors.lastname: Xie
authors.forename: Qing-feng
authors.initials: QF
authors.lastname: Sun