title: Direct imaging of electron states in open quantum dots.
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.
authors.affiliation: Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Aoki
authors.forename: R
authors.initials: R
authors.lastname: Brunner
authors.forename: A M
authors.initials: AM
authors.lastname: Burke
authors.forename: R
authors.initials: R
authors.lastname: Akis
authors.forename: R
authors.initials: R
authors.lastname: Meisels
authors.forename: D K
authors.initials: DK
authors.lastname: Ferry
authors.forename: Y
authors.initials: Y
authors.lastname: Ochiai