Interaction Effects in Open Nanoelectromechanical Systems*

We discuss the transient and steady-state transport properties of nanoelectromechanical systems (NEMS) in the quantum regime.
The system consists of quantum wire electrostatically coupled to a nearby nanoresonator (NR). The intertwined dynamics of the open NEMS is described within a generalized master equation which is exact with respect to the electron-vibron coupling.
The eigenfunctions of the nanoelectromechanical system are found using configuration-interaction methods.
We introduce an improved description of the electron-vibron coupling by taking into account the sample specific single-particle
functions. We analyze how the electron-vibron coupling and the Coulomb interaction affect the energy spectrum of the NEMS. This fact causes
the removal or the onset of the Coulomb blockade as the distance between the NR and the mesoscopic system is changed. The time-dependent filling of the vibronic states is analyzed as a function of bias.