Simulation studies of photon-assisted quantum transport

Yakubo, Kousuke; Shen, Feng; Hu, Qing

doi:10.1103/physrevb.54.7987

Cited by 30 publications

(17 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In Refs. [18][19][20][21][22][23][24] it has been claimed that, since the magnetic field has a vanishing mean, the only effect of the random mag-netic field is to break time reversal invariance, and hence that the localization properties are those of the standard unitary symmetry class. On the other hand, Zhang and Arovas 27 have argued that this argument might be too naive and that a scaling theory closely related to that of the Kosterlitz-Thouless transition controls the localization properties of the random magnetic flux problem.…”

Section: Introductionmentioning

confidence: 99%

Random magnetic flux problem in a quantum wire

1999

View full text Add to dashboard Cite

The random magnetic flux problem on a lattice and in a quasi one-dimensional (wire) geometry is studied both analytically and numerically. The first two moments of the conductance are obtained analytically. Numerical simulations for the average and variance of the conductance agree with the theory. We find that the center of the band ε = 0 plays a special role. Away from ε = 0, transport properties are those of a disordered quantum wire in the standard unitary symmetry class. At the band center ε = 0, the dependence on the wire length of the conductance departs from the standard unitary symmetry class and is governed by a new universality class, the chiral unitary symmetry class. The most remarkable property of this new universality class is the existence of an even-odd effect in the localized regime: Exponential decay of the average conductance for an even number of channels is replaced by algebraic decay for an odd number of channels.

show abstract

Section: Introductionmentioning

confidence: 99%

Random magnetic flux problem in a quantum wire

1999

View full text Add to dashboard Cite

show abstract

“…The purpose is to increase the coupling between the electrons and the photons by breaking the longitudinal translational invariance. That the coupling between the photon field and the conduction electrons can be much enhanced, when either the electrons are confined or the time-dependent field has a localized profile, has been pointed out recently by Yakubo et al 39 Thus the QPC needs to be in the near-field regime of the timedependent field.…”

Section: Numerical Results and Discussionmentioning

confidence: 96%

Coherent quantum transport in the presence of a finite-range transversely polarized time-dependent field

Tang

Chu

2000

Physica B: Condensed Matter

View full text Add to dashboard Cite

This work investigates the quantum transport in a narrow constriction acted upon by a finiterange transversely polarized time-dependent electric field. A generalized scattering-matrix method is developed that has incorporated a time-dependent mode-matching scheme. The transverse field induces coherent inelastic scatterings that include both intersubband and intersideband transitions. These scatterings give rise to the dc conductance G a general suppressed feature that escalates with the chemical potential. In addition, particular suppressed features -the dip structures -are found in G. These features are recognized as the quasi-bound-state (QBS) features that arise from electrons making intersubband transitions to the vicinity of a subband bottom. For the case of larger field intensities, the QBS features that involve more photons are more evident. These QBS features are closely associated with the singular density of states at the subband bottoms. An experimental setup is proposed for the observation of these features.

show abstract

“…The dot and superlattice experiments have stimulated new theoretical interest in ac transport through non-superconducting structures. For instance, new results have been obtained for PAT across a single tunnel barrier for different sorts of oscillating potentials [40]; for PAT through superlattices in a self-consistent treatment [41], for the ac effects on transport through a QPC and double barrier structures in a numerical study [42], for the ac effects on correlated transport through Luttinger liquids [43], and for the Kondo effect in irradiated quantum dots [44].…”

Section: Discussionmentioning

confidence: 99%

Photon Assisted Tunneling in Quantum Dots

Wiel

Oosterkamp

Franceschi

et al. 2002

View full text Add to dashboard Cite

Abstract. This internal file takes care of list definitions and 'general' point size options. 1.1. Section size commands added command: \little. This is identical to \tiny here. Allowed type provided values: 5/6, 6/7, 7/8, 8/9.5, 9/11, 10/12, 11/13, 12/14, 14/18, 17/22, 20 Textheight and textwidthThese are the main reason for the existence of these files. For some stupid reason, L A T E X calculates textwidth out of \paperwidth. We did want to support letter paper, but our \textwidth is fixed, with the margins being calculated.Presume \textwidth and \marginparwidth are set in the stylefile, or we're in trouble. The 2pc value is used to compensate for the 'dead' corners in most laserprinters.Calculations are done 'AtBeginDocument' to allow changes made in the preamble and later on in the stylefile. Abstract. This internal file takes care of list definitions and 'general' point size options. This is a 'tight' file. 6/7, 7/8, 8/9, 9/10.5, 10/11.5, 11/13, 12/14, 14/18, 17/22, 20

show abstract

Simulation studies of photon-assisted quantum transport

Cited by 30 publications

References 43 publications

Random magnetic flux problem in a quantum wire

Random magnetic flux problem in a quantum wire

Coherent quantum transport in the presence of a finite-range transversely polarized time-dependent field

Photon Assisted Tunneling in Quantum Dots

Contact Info

Product

Resources

About