Year: 2006
Type: article
Abstract: If the Ehrenfest time ${\ensuremath{\tau}}_{\mathrm{E}}$ of a ballistic cavity is not negligible in comparison to its dwell time ${\ensuremath{\tau}}_{\mathrm{D}}$, the weak localization correction to the cavity's transmission is suppressed proportional to $\mathrm{exp}(\ensuremath{-}{\ensuremath{\tau}}_{\mathrm{E}}/{\ensuremath{\tau}}_{\mathrm{D}})$. At the same time, quantum interference enhances the probability of reflection into the mode of incidence by a factor two. This ``enhanced backscattering'' does not depend on the Ehrenfest time. We show that, in addition to the diagonal enhanced backscattering, there are off-diagonal contributions to coherent backscattering that become relevant if ${\ensuremath{\tau}}_{\mathrm{E}}\ensuremath{\gtrsim}{\ensuremath{\tau}}_{\mathrm{D}}$.
Source: Physical Review Letters
Authors: Saar Rahav, Piet W. Brouwer
Institution: Cornell University
Language: English
Subfield: Statistical and Nonlinear Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2074792978