Geodesic
Unbounded random operators and Feynman formulae
Izvestiya. Mathematics , Tome 80 (2016) no. 6, pp. 1131-1158.

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We introduce and study probabilistic interpolations of various quantization methods. To do this, we develop a method for finding the expectations of unbounded random operators on a Hilbert space by averaging (with the help of Feynman formulae) the random one-parameter semigroups generated by these operators (the usual method for finding the expectations of bounded random operators is generally inapplicable to unbounded ones). Although the averaging of families of semigroups generates a function that need not possess the semigroup property, the Chernoff iterates of this function approximate a certain semigroup, whose generator is taken for the expectation of the original random operator. In the case of bounded random operators, this expectation coincides with the ordinary one.
Keywords: one-parameter semigroup, random operator, Hamiltonian operator, Hamiltonian function, Chernoff's formula, Chernoff equivalence, randomization
Mots-clés : quantization, Feynman formula, probabilistic interpolation. 
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Yu. N. Orlov; V. Zh. Sakbaev; O. G. Smolyanov. Unbounded random operators and Feynman formulae. Izvestiya. Mathematics , Tome 80 (2016) no. 6, pp. 1131-1158. http://geodesic.mathdoc.fr/item/IM2_2016_80_6_a7/

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