Quantum conductance fluctuations and classical short-path dynamics

Journal Article · Sun Jan 15 04:00:00 EST 1995 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.51.2013· OSTI ID:6869926

Ishio, H; Burgdoerfer, J ^[1]

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1. Department of Physics, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States) Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6377 (United States)

We present numerical results for ballistic-electron quantum transport through weakly open integrable circle and chaotic stadium billiards. The geometry of the pair of conducting leads is chosen in accordance with recent experiments for semiconductor microstructures [Marcus [ital et] [ital al]., Phys. Rev. Lett. [bold 69], 506 (1992)]. The conductance as a function of the Fermi wave number displays characteristic noisy fluctuations for both the integrable and the chaotic systems. We show that structures in the conductance autocorrelation function as a function of the Fermi wave number are related to short-length classical orbits. This correspondence permits incorporation of effects of phase decoherence due to incoherent scattering into the quantum calculation.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6869926
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 51:3; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

661100* -- Classical & Quantum Mechanics-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATION FUNCTIONS
DYNAMICS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FLUCTUATIONS
FUNCTIONS
MAGNETORESISTANCE
MECHANICS
PHYSICAL PROPERTIES
QUANTIZATION
SCATTERING
SEMICONDUCTOR DEVICES
VARIATIONS