The role of electron phase coherence in quantum transport through open ballistic cavities

Jonathan P. Bird; Adam P. Micolich; Richard Akis; David K. Ferry; Richard Newbury; Richard P. Taylor; Dapsy M. Olatona; Rene Wirtz; Yuichi Ochiai; Koji Ishibashi; Yoshinobu Aoyagi; Takuo Sugano

doi:10.1143/jjap.36.3968

The role of electron phase coherence in quantum transport through open ballistic cavities

Jonathan P. Bird
, Adam P. Micolich
, Richard Akis
, David K. Ferry
, Richard Newbury
, Richard P. Taylor
, Dapsy M. Olatona
, Rene Wirtz
, Yuichi Ochiai
, Koji Ishibashi
, Yoshinobu Aoyagi
, Takuo Sugano

Department of Electrical Engineering

University of New South Wales
Arizona State University
Chiba University
RIKEN

Research output: Contribution to journal › Article › peer-review

Abstract

We consider the factors which limit electron wave coherence in open quantum dots, through a study of the reproducible fluctuations in their low temperature magneto-resistance. Our investigations indicate that at temperatures well below a degree Kelvin, electrons are able to propagate ballistically while maintaining phase coherence over very long time scales. Indeed, simple calculation reveals that electrons may undergo as many as a hundred collisions with the confining walls before coherence of their wavefunction is fully randomized.

Original language	English
Pages (from-to)	3968-3970
Number of pages	3
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	36
Issue number	6 SUPPL. B
DOIs	https://doi.org/10.1143/jjap.36.3968
State	Published - Jun 1997

Keywords

Collimation
Magneto-conductance fluctuations
Phase coherence
Quantum chaos
Quantum dots
Wavefunction scarring

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Bird, J. P., Micolich, A. P., Akis, R., Ferry, D. K., Newbury, R., Taylor, R. P., Olatona, D. M., Wirtz, R., Ochiai, Y., Ishibashi, K., Aoyagi, Y., & Sugano, T. (1997). The role of electron phase coherence in quantum transport through open ballistic cavities. Japanese Journal of Applied Physics, Part 2: Letters, 36(6 SUPPL. B), 3968-3970. https://doi.org/10.1143/jjap.36.3968

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title = "The role of electron phase coherence in quantum transport through open ballistic cavities",

abstract = "We consider the factors which limit electron wave coherence in open quantum dots, through a study of the reproducible fluctuations in their low temperature magneto-resistance. Our investigations indicate that at temperatures well below a degree Kelvin, electrons are able to propagate ballistically while maintaining phase coherence over very long time scales. Indeed, simple calculation reveals that electrons may undergo as many as a hundred collisions with the confining walls before coherence of their wavefunction is fully randomized.",

keywords = "Collimation, Magneto-conductance fluctuations, Phase coherence, Quantum chaos, Quantum dots, Wavefunction scarring",

author = "Bird, \{Jonathan P.\} and Micolich, \{Adam P.\} and Richard Akis and Ferry, \{David K.\} and Richard Newbury and Taylor, \{Richard P.\} and Olatona, \{Dapsy M.\} and Rene Wirtz and Yuichi Ochiai and Koji Ishibashi and Yoshinobu Aoyagi and Takuo Sugano",

year = "1997",

month = jun,

doi = "10.1143/jjap.36.3968",

language = "English",

volume = "36",

pages = "3968--3970",

journal = "Japanese Journal of Applied Physics, Part 2: Letters",

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number = "6 SUPPL. B",

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T1 - The role of electron phase coherence in quantum transport through open ballistic cavities

AU - Bird, Jonathan P.

AU - Micolich, Adam P.

AU - Akis, Richard

AU - Ferry, David K.

AU - Newbury, Richard

AU - Taylor, Richard P.

AU - Olatona, Dapsy M.

AU - Wirtz, Rene

AU - Ochiai, Yuichi

AU - Ishibashi, Koji

AU - Aoyagi, Yoshinobu

AU - Sugano, Takuo

PY - 1997/6

Y1 - 1997/6

N2 - We consider the factors which limit electron wave coherence in open quantum dots, through a study of the reproducible fluctuations in their low temperature magneto-resistance. Our investigations indicate that at temperatures well below a degree Kelvin, electrons are able to propagate ballistically while maintaining phase coherence over very long time scales. Indeed, simple calculation reveals that electrons may undergo as many as a hundred collisions with the confining walls before coherence of their wavefunction is fully randomized.

AB - We consider the factors which limit electron wave coherence in open quantum dots, through a study of the reproducible fluctuations in their low temperature magneto-resistance. Our investigations indicate that at temperatures well below a degree Kelvin, electrons are able to propagate ballistically while maintaining phase coherence over very long time scales. Indeed, simple calculation reveals that electrons may undergo as many as a hundred collisions with the confining walls before coherence of their wavefunction is fully randomized.

KW - Collimation

KW - Magneto-conductance fluctuations

KW - Phase coherence

KW - Quantum chaos

KW - Quantum dots

KW - Wavefunction scarring

UR - https://www.scopus.com/pages/publications/3643122025

U2 - 10.1143/jjap.36.3968

DO - 10.1143/jjap.36.3968

M3 - Article

AN - SCOPUS:3643122025

SN - 0021-4922

VL - 36

SP - 3968

EP - 3970

JO - Japanese Journal of Applied Physics, Part 2: Letters

JF - Japanese Journal of Applied Physics, Part 2: Letters

IS - 6 SUPPL. B

ER -

The role of electron phase coherence in quantum transport through open ballistic cavities

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Keywords

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