Dephasing in a quantum pump
arXiv:cond-mat/0110437 · doi:10.1103/PhysRevB.65.115333
Abstract
We study how dephasing affects the distribution of the dc current pumped through a chaotic quantum dot. We introduce dephasing by the addition of a voltage probe to the quantum dot, treating both the case of controlled dephasing (when the voltage probe is coupled to the dot via a ballistic point contact with a conductance that is increased stepwise) and intrinsic dephasing (for which the voltage probe serves as a phenomelogical model). While dephasing eventually suppresses the dc current through the dot, we also find that, for a quantum dot with single-mode point contacts, a small amount of dephasing actually decreases the likelihood of a zero pumped current.
8 pages, 5 figures
References in corpus (4)
Cited by in corpus (39)
- Photon-assisted transport in semiconductor nanostructures
- Floquet scattering theory of quantum pumps
- Coherent and Collective Quantum Optical Effects in Mesoscopic Systems
- Dissipation and noise in adiabatic quantum pumps
- An Adiabatic Quantum Pump of Spin Polarized Current
- Adiabatic Transfer of Electrons in Coupled Quantum Dots
- Floquet scattering theory for current and heat noise in large amplitude adiabatic pumps
- Quantum spin pumping with adiabatically modulated magnetic barrier's
- Charge Pumping in Mesoscopic Systems coupled to a Superconducting Lead
- Adiabatic spin pumping through a quantum dot with a single orbital level
- Geometrical Pumping in Quantum Transport: Quantum Master Equation Approach
- Charge Transport Through Open, Driven Two-Level Systems with Dissipation
- Phase coherence, inelastic scattering, and interaction corrections in pumping through quantum dots
- Hidden quantum pump effects in quantum coherent rings
- Mesoscopic fluctuations of nonlinear conductance of chaotic quantum dots
- Adiabatic Charge Pumping through Quantum Dots in the Coulomb Blockade Regime
- Endstates in multichannel spinless p-wave superconducting wires
- Statistical fluctuations of pumping and rectification currents in quantum dots
- Geometrical Formulation of Adiabatic Pumping as a Heat Engine
- Decoherence in current induced forces: Application to adiabatic quantum motors
- Effects of interaction on an adiabatic quantum electron pump
- Noise-assisted classical adiabatic pumping in a symmetric periodic potential
- Decoherence Driven Quantum Transport
- Dynamics and decoherence in nonideal Thouless quantum motors
- Matrix Element Distribution as a Signature of Entanglement Generation
- Thermodynamics and steady state of quantum motors and pumps far from equilibrium
- Effects of Dephasing on Quantum Adiabatic Pumping with Nonequilibrium Initial States
- Non-adiabatic effect in quantum pumping for a spin-boson system
- Quantum Pumping and Quantized Magnetoresistance in a Hall Bar
- Quantum chaotic scattering in time-dependent external fields: random matrix approach
- Theory of Non-Coherent Spin Pumps
- Semiclassical theory of a quantum pump
- Quantum pump driven fermionic Mach-Zehnder interferometer
- Fluctuation Relations For Adiabatic Pumping
- Adiabatic charge pumping through a dot at the junction of N quantum wires
- Quantum charge pumping through Majorana bound states
- Statistical fluctuations of the parametric derivative of the transmission and reflection coefficients in absorbing chaotic cavities
- Quantum adiabatic pumping by modulating tunnel phase in quantum dots
- Quantum Pumping and Nuclear Polarization in the Integer Quantum Hall Regime