Correlated time-dependent transport through a 2D quantum structure

Abstract

We use a generalized master equation (GME) to describe the nonequilibrium magnetotransport of interacting electrons through a broad finite quantum wire with an embedded ring structure. The finite quantum wire is weakly coupled to two broad leads acting as reservoirs of electrons. The mutual Coulomb interaction of the electrons is described using a configuration interaction method for the many-electron states of the central system. We report some non-trivial interaction effects both at the level of time-dependent filling of states and on the time-dependent transport. We find that the Coulomb interaction in this non-trivial geometry can enhance the correlation of electronic states in the system and facilitate it's charging in certain circumstances in the weak coupling limit appropriate for the GME. In addition, we find oscillations in the current in the leads due to the correlations oscillations caused by the switched-on lead- system coupling. The oscillations are influenced and can be enhanced by the external magnetic field and the Coulomb interaction.

RevTeX (pdf-LaTeX), 10 pages with 15 included jpg figures

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Cited by in corpus (8)

• Time-dependent transport of electrons through a photon cavity
• Stepwise introduction of model complexity in a generalized master equation approach to time-dependent transport
• Magnetic-field influenced non-equilibrium transport through a quantum ring with correlated electrons in a photon cavity
• Time-dependent magnetotransport in an interacting double quantum wire with window coupling
• Efficient determination of the Markovian time-evolution towards a steady-state of a complex open quantum system
• Coherent transient transport of interacting electrons through a quantum waveguide switch
• Turnstile pumping through an open quantum wire
• First-principles study of electron transport in few-electron open quantum dots by the Hartree-Fock approach