Mon, 30 Apr 2007
14:15
DH 3rd floor SR

Parabolic Anderson model: Localisation of mass in random media

Dr Nadia Sidorova
(University of Bath)
Abstract

 

We study the parabolic Anderson problem, i.e., the heat equation on the d-dimentional

integer lattice with independent identically distributed random potential and

localised initial condition. Our interest is in the long-term behaviour of the

random total mass of the unique non-negative solution, and we prove the complete

localisation of mass for potentials with polynomial tails.

 

Thu, 08 Jun 2006
16:30
DH 1st floor SR

A teleparallel reformulation of Dirac's equation or quantum electrodynamics for dummies

Dimitri Vassiliev
(University of Bath)
Abstract
The price we pay for this simplicity is that the change of variable
spinor --> coframe
makes the Dirac equation nonlinear. The morale of the talk is that, in our opinion, it is more natural to view the Dirac equation as a nonlinear equation for the unknown coframe rather than a linear equation for the unknown spinor.
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