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

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.

9 pages, 11 figures

References in corpus (20)

• Continuous-time Monte Carlo methods for quantum impurity models
• Molecular Transport Junctions: Vibrational Effects
• Real-time path integral approach to nonequilibrium many-body quantum system
• Inelastic electron tunneling via molecular vibrations in single-molecule transistors
• Franck-Condon blockade in suspended carbon nanotube quantum dots
• Diagrammatic Monte Carlo simulation of non-equilibrium systems
• Theory of the Franck-Condon blockade regime
• Tunneling in suspended carbon nanotubes assisted by longitudinal phonons
• Transient dynamics of the Anderson impurity model out of equilibrium
• Inelastic tunneling effects on noise properties of molecular junctions
• Phonon-assisted current noise in molecular junctions
• Electron-phonon interaction and full counting statistics in molecular junctions
• Charge transfer statistics of a molecular quantum dot with a vibrational degree of freedom
• Bistability signatures in nonequilibrium charge transport through molecular quantum dots
• Charge transfer statistics of a molecular quantum dot with strong electron-phonon interaction
• Nonequilibrium magnetotransport through a quantum dot: An interpolative perturbative approach
• Long transient dynamics in the Anderson-Holstein model out of equilibrium
• Anderson impurity model in nonequilibrium: analytical results versus quantum Monte Carlo data
• Interpolative approach for electron-electron and electron-phonon interactions: from the Kondo to the polaronic regime
• Transport through a molecular quantum dot in the polaron crossover regime