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

Research output: Contribution to journalArticle

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 languageEnglish (US)
Pages (from-to)3968-3970
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume36
Issue number6 SUPPL. B
DOIs
StatePublished - Jun 1997

Keywords

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

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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  • Cite this

    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 1: Regular Papers and Short Notes and Review Papers, 36(6 SUPPL. B), 3968-3970. https://doi.org/10.1143/jjap.36.3968