Browsing by Subject "Aharonov-Bohm effect"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    ItemOpen Access
    Quantum computation with persistent-current Aharonov-Bohm qubits and qugates
    (Computational Publications, 2003) Kulik, Igor O.
    We analyse the possibility of employing mesoscopic or nanoscopic rings of a normal metal in a double degenerate persistent-current state in the presence of the Aharonov-Bohm flux equal to the half flux quantum as entangled quantum bits of information (qu-bits). The third level in a three-state qubit can be effectively used to coherently couple the qu-bit to logical gates for the reversible NOT (in a single qu-bit) and CNOT (in two coupled qu-bits) operations. Further we suggest that a (hypothetic) crystal implementing conducting ring-shaped molecules, or triples of anionic vacancies (similar to F 3-centers in alkali halides) with one trapped electron, in crossed magnetic and electric fields satisfies the requirements of the proposed mechanism and may serve as a new kind of device for universal quantum computation.
  • Thumbnail Image
    ItemOpen Access
    "Transverse" persistent currents in mesoscopic cylinders and rings
    (Elsevier, 2000) Kulik, I. O.
    Persistent current is a nondecaying current in a normal metal ring or cylinder induced by the vector potential applied parallel to the direction of the current (longitudinal, or Aharonov-Bohm persistent current). A magnetic field applied perpendicular to the wall of the hollow metallic cylinder also produces an azimuthal nondecaying current (a transverse persistent current) even in the absence of the Aharonov-Bohm flux. Magnetic moment of a single connected conductor (a 2d conducting stripe) is supported by a current (a Landau-persistent current) which is shown to oscillate in space. © 2000 Published by Elsevier Science B.V. All rights reserved.