Direct imaging of electron states in open quantum dots

N. Aoki, R. Brunner, A. M. Burke, R. Akis, R. Meisels, D. K. Ferry, Y. Ochiai

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

We use scanning gate microscopy to probe the ballistic motion of electrons within an open GaAs/AlGaAs quantum dot. Conductance maps are recorded by scanning a biased tip over the open quantum dot while a magnetic field is applied. We show that, for specific magnetic fields, the measured conductance images resemble the classical transmitted and backscattered trajectories and their quantum mechanical analogue. In addition, we prove experimentally, with this direct measurement technique, the existence of pointer states. The demonstrated direct imaging technique is essential for the fundamental understanding of wave function scarring and quantum decoherence theory.

Original languageEnglish (US)
Article number136804
JournalPhysical Review Letters
Volume108
Issue number13
DOIs
StatePublished - Mar 30 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Aoki, N., Brunner, R., Burke, A. M., Akis, R., Meisels, R., Ferry, D. K., & Ochiai, Y. (2012). Direct imaging of electron states in open quantum dots. Physical Review Letters, 108(13), [136804]. https://doi.org/10.1103/PhysRevLett.108.136804