• Wave attenuation model for dephasing and measurement of conditional times

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      https://www.ias.ac.in/article/fulltext/pram/059/02/0385-0395

    • Keywords

       

      Electron transport; dephasing; sojourn times; wave attenuation

    • Abstract

       

      Inelastic scattering induces dephasing in mesoscopic systems. An analysis of previous models to simulate inelastic scattering in such systems is presented and a relatively new model based on wave attenuation is introduced. The problem of Aharonov-Bohm (AB) oscillations in conductance of a mesoscopic ring is studied. We show that the conductance is symmetric under flux reversal and the visibility of AB oscillations decays to zero as a function of the incoherence parameter, signaling dephasing. Further the wave attenuation model is applied to a fundamental problem in quantum mechanics, that of the conditional (reflection/transmission) times spent in a given region of space by a quantum particle before scattering off from that region.

    • Author Affiliations

       

      AM Jayannavar1 Colin Benjamin1

      1. Institute of Physics, Sachivalaya Marg, Bhubaneswar - 751 005, India
    • Dates

       
  • Pramana – Journal of Physics | News

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