The influence of high-frequency fields on quantum transport through a quantum dot is studied in the low-temperature regime. We generalize the non crossing approximation for the infinite-U Anderson model to the timedependent case. The dc spectral density shows asymmetric Kondo side peaks due to photon-assisted resonant tunneling. As a consequence we predict an electron-photon pump at zero bias w...

We describe a quantum many-body system undergoing multiple resonant tunneling which exhibits chaotic behavior in numerical simulations of a mean eld approximation. This phenomenon, which has no counterpart in the classical limit, is due to eeective nonlinearities in the tunneling process and can be observed in principle within a heterostructure.

This Letter presents a novel and extremely compact circuit topology able to implement a generalized threshold logic function with two thresholds. The circuit consists of resonant tunnelling diodes (RTDs) and heterostructure field effect transistors (HFETs). Introduction: Resonant tunneling devices are nowadays considered the most mature type of quantum-effect devices. They are already operating...

Electron-tunneling dynamics through a semiconductor double-barrier structure in the presence of plane-wave phonons is investigated by directly solving the time-dependent Schrodinger equation. The temporal profile of tunneling current density due to an electron wave packet incident at the resonant energy channel E„ is calculated at different lattice temperatures. The magnitude of the tunneling c...

the electronic conductance at zero temperature through a quantum wire with side-connected asymmetric quantum ring (as a scatter system) is theoretically studied using the non-interacting hamiltonian anderson tunneling method. in this paper we concentrate on the configuration of the quantum dot rings. we show that the asymmetric structure of qd-scatter system strongly influences the amplitude an...

We present a microscopic theory for both equilibrium and nonequilibrium transport properties of coupled double quantum dots (DQD). A general formula for current tunneling through the DQD is derived by the nonequilibrium Green’s function method. Using a Hartree-Fock approach, effects of multilevel coupling and nonequilibrium electron distributions in resonant tunneling are considered. We find th...

In the interlayer pair tunneling (ILPT) theory of superconductivity the large scale Tc has its origin in the k-space locality of the inter layer pair tunneling matrix elements. We reinterpret the same physics as a process of resonant pair tunneling and illustrate it through cooper pair analysis. This interpretation is used to give a mechanism which leads to a singular suppression of Tc as funct...