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arXiv · 1503.00222

Local density of states on a vibrational quantum dot out of equilibrium

Klaus Ferdinand Albrecht·Alvaro Martin-Rodero·Johannes Schachenmayer·Lothar Mühlbacher
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Abstract

We calculate the nonequilibrium local density of states on a vibrational quantum dot coupled to two electrodes at T=0 using a numerically exact diagrammatic Monte Carlo method. Our focus is on the interplay between the electron-phonon interaction strength and the bias voltage. We find that the spectral density exhibits a significant voltage dependence if the voltage window includes one or more phonon sidebands. A comparison with well-established approximate approaches indicates that this effect could be attributed to the nonequilibrium distribution of the phonons. Moreover, we discuss the long transient dynamics caused by the electron-phonon coupling.

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Klaus Ferdinand Albrecht, Alvaro Martin-Rodero, Johannes Schachenmayer, Lothar Mühlbacher. 2015-03-01. Local density of states on a vibrational quantum dot out of equilibrium. https://doi.org/10.1103/physrevb.91.064305

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