Theoretical investigation of the dynamic electronic response of a quantum dot driven by time-dependent voltage

Details Theoretical investigation of the dynamic electronic response of a quantum dot driven by time-dependent voltage Theoretical investigation of the dynamic electronic response of a quantum dot driven by time-dependent voltage

2008-07-22

arxiv.org/abs/0807.3393v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1063/1.3010886

We present a comprehensive theoretical investigation on the dynamic electronic response of a noninteracting quantum dot system to various forms of time-dependent voltage applied to the single contact lead. Numerical simulations are carried out by implementing a recently developed hierarchical equations of motion formalism [J. Chem. Phys. 128, 234703 (2008)], which is formally exact for a fermionic system interacting with grand canonical fermionic reservoirs, in the presence of arbitrary time-dependent applied chemical potentials. The dynamical characteristics of the transient transport current evaluated in both linear and nonlinear response regimes are analyzed, and the equivalent classic circuit corresponding to the coupled dot-lead system is also discussed.

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