Bounds on the heat kernel of the Schroedinger operator in a random electromagnetic field
arXiv:quant-ph/0604068 · doi:10.1088/0305-4470/39/31/019
Abstract
We obtain lower and upper bounds on the heat kernel and Green functions of the Schroedinger operator in a random Gaussian magnetic field and a fixed scalar potential. We apply stochastic Feynman-Kac representation, diamagnetic upper bounds and the Jensen inequality for the lower bound. We show that if the covariance of the electromagnetic (vector) potential is increasing at large distances then the lower bound is decreasing exponentially fast for large distances and a large time.
some technical improvements, new references, to appear in Journ.Phys.A