Diffractive paths for weak localization in quantum billiards

Brezinova, I.; Stampfer, C.; Wirtz, L.; Rotter, S.; Burgdorfer, J.

Document type :

Article dans une revue scientifique

DOI :

10.1103/PhysRevB.77.165321

Title :

Diffractive paths for weak localization in quantum billiards

Author(s) :

Brezinova, I. [Auteur]
Stampfer, C. [Auteur]
Wirtz, L. [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Rotter, S. [Auteur]
Burgdorfer, J. [Auteur]

Journal title :

Physical Review B: Condensed Matter and Materials Physics (1998-2015)

Pages :

165321-1-5

Publisher :

American Physical Society

Publication date :

2008

ISSN :

1098-0121

HAL domain(s) :

Sciences de l'ingénieur [physics]

English abstract : [en]

We study the weak localization effect in quantum transport through a clean ballistic cavity with regular classical dynamics. We address the question which paths account for the suppression of conductance through a system ...
Show more >We study the weak localization effect in quantum transport through a clean ballistic cavity with regular classical dynamics. We address the question which paths account for the suppression of conductance through a system where disorder and chaos are absent. By exploiting both quantum and semiclassical methods, we unambiguously identify paths that are diffractively backscattered into the cavity (when approaching the lead mouths from the cavity interior) to play a key role. Diffractive scattering couples transmitted and reflected paths and is thus essential to reproduce the weaklocalization peak in reflection and the corresponding anti-peak in transmission. A comparison of semiclassical calculations featuring these diffractive paths yields good agreement with full quantum calculations and experimental data. Our theory provides system-specific predictions for the quantum regime of few open lead modes and can be expected to be relevant also for mixed as well as chaotic systems.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Non spécifiée

Popular science :

Non

Collections :

Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL

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