The Condensed Matter & Surface Sciences Colloquium Series presents Silvia Viola Kusminskiy of University of Erlangen-Nuremberg on “Adiabatic Reaction Forces in Mesoscopic Systems,” on Thursday, March 31, at 4:10 p.m. in Walter 245.
Silvia Viola Kusminskiy
Abstract: Nanoelectromechanical systems are characterized by an intimate connection between electronic and mechanical degrees of freedom. Due to the nanoscopic scale, current flowing through the system noticeably impacts the vibrational dynamics of the device, complementing the effect of the vibrational modes on the electronic dynamics. In this talk I go over recent experimental results that show the dramatic effect of the electron-vibron coupling for suspended quantum dots in the Coulomb blockade regime, accompanied by a comprehensive theoretical description based on a Master equation approach. On the second part of the talk, I describe our recently developed formalism for the complementary regime of coherent transport, in which we employ the scattering matrix approach to quantum transport to describe the current-induced forces acting on the mechanical degrees of freedom of an out-of-equilibrium nanoelectromechanical system. These forces control the Langevin dynamics of the mechanical modes and can be the basis for designing “quantum engines”.
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