Levy flights, dynamical duality and fractional quantum mechanics

Details Levy flights, dynamical duality and fractional quantum mechanics Levy flights, dynamical duality and fractional quantum mechanics

2008-11-24

arxiv.org/abs/0811.3856v2

Acta Phys. Pol. B 40, 1087-1101, (2009)

Physics

Condensed Matter

Statistical Mechanics

Misprints corrected, minor amendments, subm. to Acta Phys. Pol. B, presented at 21st Marian Smoluchowski Symposium

Scientific paper

We discuss dual time evolution scenarios which, albeit running according to the same real time clock, in each considered case may be mapped among each other by means of an analytic continuation in time. This dynamical duality is a generic feature of diffusion-type processes. Technically that involves a familiar transformation from a non-Hermitian Fokker-Planck operator to the Hermitian operator (e.g. Schroedinger Hamiltonian), whose negative is known to generate a dynamical semigroup. Under suitable restrictions upon the generator, the semigroup admits an analytic continuation in time and ultimately yields dual motions. We analyze an extension of the duality concept to Levy flights, free and with an external forcing, while presuming that the corresponding evolution rule (fractional dynamical semigroup) is a dual counterpart of the quantum motion (fractional unitary dynamics).

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