Feynman-Kac Kernels in Markovian Representations of the Schroedinger Interpolating Dynamics

Details Feynman-Kac Kernels in Markovian Representations of the Schroedinger Interpolating Dynamics Feynman-Kac Kernels in Markovian Representations of the Schroedinger Interpolating Dynamics

1995-05-23

arxiv.org/abs/quant-ph/9505012v2

J.Math.Phys. 37 (1996) 732-751

Physics

Quantum Physics

Latex file, J. Math. Phys., accepted for publication

Scientific paper

10.1063/1.531412

Probabilistic solutions of the so called Schr\"{o}dinger boundary data problem provide for a unique Markovian interpolation between any two strictly positive probability densities designed to form the input-output statistics data for the process taking place in a finite-time interval. The key issue is to select the jointly continuous in all variables positive Feynman-Kac kernel, appropriate for the phenomenological (physical) situation. We extend the existing formulations of the problem to cases when the kernel is \it not \rm a fundamental solution of a parabolic equation, and prove the existence of a continuous Markov interpolation in this case. Next, we analyze the compatibility of this stochastic evolution with the original parabolic dynamics, while assumed to be governed by the temporally adjoint pair of (parabolic) partial differential equations, and prove that the pertinent random motion is a diffusion process. In particular, in conjunction with Born's statistical interpretation postulate in quantum theory, we consider stochastic processes which are compatible with the Schr\"{o}dinger picture quantum evolution.

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