Time-dependent magnetotransport of a wave packet in a quantum wire with embedded quantum dots
arXiv:0708.0103 · doi:10.1103/PhysRevB.76.195314
Abstract
We consider wave packet propagation in a quantum wire with either an embedded antidot or an embedded parallel double open quantum dot under the influence of a uniform magnetic field. The magnetoconductance and the time evolution of an electron wave packet are calculated based on the Lippmann-Schwinger formalism. This approach allows us to look at arbitrary embedded potential profiles and illustrate the results by performing computational simulations for the conductance and the time evolution of the electron wave packet through the quantum wire. In the double-dot system we observe a long-lived resonance state that enhances the spatial spreading of the wave packet, and quantum skipping-like trajectories are induced when the envelop function of the wave packet covers several subbands in appropriate magnetic fields.
RevTeX, 9 pages with 8 included postscript figures
References in corpus (21)
- Imaging Magnetic Focusing of Coherent Electron Waves
- Fano-Rashba effect in a quantum wire
- Quantum criticality in a double quantum-dot system
- The relaxation time of a chiral quantum R-L circuit
- Coherent probing of excited quantum dot states in an interferometer
- Coherent electronic transport in a multimode quantum channel with Gaussian-type scatterers
- Strain-Induced Coupling of Spin Current to Nanomechanical Oscillations
- Coherent quantum transport in narrow constrictions in the presence of a finite-range longitudinally polarized time-dependent field
- Transport through a quantum ring, a dot and a barrier embedded in a nanowire in magnetic field
- Spectral properties and magneto-optical excitations in semiconductor double-rings under Rashba spin-orbit interaction
- Dynamics and Current Fluctuations in AC driven Charge Shuttle
- Transport spectroscopy in a time-modulated open quantum dot
- Entanglement between static and flying qubits in an Aharonov-Bohm double electrometer
- Coherent quantum transport in the presence of a finite-range transversely polarized time-dependent field
- Finger-gate array quantum pumps:pumping characteristics and mechanisms
- A state with negative binding energy induced by coherent transport in a quantum wire
- Magnetotransport in a double quantum wire: Modeling using a scattering formalism built on the Lippmann-Schwinger equation
- Tuning of coupling modes in laterally parallel double open quantum dots
- Differential conductance of a saddle-point constriction with a time-modulated gate-voltage
- Coherent magnetotransport spectroscopy in an edge-blocked double quantum wire with window and resonator coupling
- Charged particle motion in a time-dependent flux-driven ring: an exactly solvable model