November 22, 1988 - November 22, 2021

  • Date:15WednesdayNovember 2017

    Chemical and Biological Physics Dept Guest Seminar

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    Time
    10:00
    Title
    Feynman path integral approach to tunnelling time
    Location
    Gerhard M.J. Schmidt Lecture Hall
    Lecturer
    Dr Alexandra Landsman
    Max Planck Institute for the Physics of Complex Systems, Germany
    Organizer
    Department of Chemical and Biological Physics
    Contact
    AbstractShow full text abstract about The tunnelling time problem is almost as old as quantum mech...»
    The tunnelling time problem is almost as old as quantum mechanics itself and is a highly debated subject. Time is not a quantum observable, and therefore many conflicting theories have been developed over the decades. Here we present the Feynman path integral (FPI) approach to tunnelling time, and show how it can be used to calculate tunnelling time probability amplitudes. The FPI approach also sheds new light on four best-known definitions of tunnelling times (Buttiker- Landauer, Pollak-Miller, Eisenbud-Wigner, and Larmor), which although derived using very different physical models, can also be represented as different averages using FPI tunnelling time probability amplitudes. Relation between the FPI approach, other tunnelling time definitions and the theory of weak measurement is also reviewed.
    Lecture