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SUMMARY:Dissipative transport in the localized regime - Schenker\, J (Mich
 igan State University)
DTSTART:20150623T123000Z
DTEND:20150623T133000Z
UID:TALK59910@talks.cam.ac.uk
CONTACT:42080
DESCRIPTION:Co-author: Jrg Frhlich (ETH) \n\nA quantum particle moving in 
 a strongly disordered random environment is known to be subject to Anderso
 n localization\, which results in the complete suppression of transport. H
 owever\, localization can be broken by a small perturbation\, such as ther
 mal noise from the environment\, resulting in diffusive motion for the par
 ticle. I will discuss this phenomenon in two models in which the Schroedin
 ger equation for a particle in the strongly localized regime is perturbed 
 by (1) a time dependent fluctuating random potential and (2) a Lindblad op
 erator incorporating the interaction with a heat bath in the Markov approx
 imation. In each case\, it can be proved that diffusive motion results wit
 h a strictly positive and finite diffusion constant. Furthermore\, the dif
 fusion constant tends continuously to zero at a calculable rate\, as the s
 trength of the perturbation is taken to zero. (Partially based on joint wo
 rk with J. Frhlich.)\n\n
LOCATION:Seminar Room 1\, Newton Institute
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