Abstract
Random Hamiltonian flows in an infinite-dimensional phase space is represented by random unitary groups in a Hilbert space. For this, the phase space is equipped with a measure that is invariant under a group of symplectomorphisms. The obtained representation of random flows allows applying the Chernoff averaging technique to random processes with values in the group of nonlinear operators. The properties of random unitary groups and the limit distribution for their compositions are described.
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References
V. Zh. Sakbaev, “Flows in infinite-dimensional phase space equipped with a finitely-additive invariant measure,” Mathematics, 11, 1161, 49 pp. (2023).
V. M. Busovikov and V. Zh. Sakbaev, “Invariant measures for Hamiltonian flows and diffusion in infinitely dimensional phase spaces,” Internat. J. Modern Phys. A, 37, 2243018, 15 pp. (2022).
V. A. Glazatov and V. Zh. Sakbaev, “Measures on Hilbert space invariant with respect to Hamiltonian flows,” Ufa Math. J., 14, 3–21 (2022).
N. N. Vakhania, V.I. Tarieladze, and S. A. Chobanyan, Probability Distributions on Banach Spaces (Mathematics and its Applications, Vol. 14), Springer, Dordrecht (1987).
R. L. Baker, “ ‘Lebesgue measure’ on \(R^{\infty}\). II,” Proc. Amer. Math. Soc., 132, 2577–2591 (2004).
V. V. Kozlov and O. G. Smolyanov, “Hamiltonian approach to secondary quantization,” Dokl. Math., 98, 571–574 (2018).
O. G. Smolyanov and N. N. Shamarov, “Schrödinger quantization of infinite-dimensional Hamiltonian systems with a nonquadratic Hamiltonian function,” Dokl. Math., 101, 227–230 (2020).
I. V. Volovich, “Complete integrability of quantum and classical dynamical systems,” \(p\)-Adic Numbers, Ultrametric Analysis and Applications, 11, 328–334 (2019).
J. Gough, Yu. N. Orlov, V. Zh. Sakbaev, and O. G. Smolyanov, “Random quantization of Hamiltonian systems,” Dokl. Math., 103, 122–126 (2021).
V. Zh. Sakbaev, “Averaging of random walks and shift-invariant measures on a Hilbert space,” Theoret. and Math. Phys., 191, 886–909 (2017).
V. Zh. Sakbaev and O. G. Smolyanov, “Lebesgue–Feynman measures on infinite dimensional spaces,” Internat. J. Theoret. Phys., 60, 546–550 (2021).
T. Gill, A. Kirtadze, G. Pantsulaia, and A. Plichko, “Existence and uniqueness of translation invariant measures in separable Banach spaces,” Funct. Approx. Comment. Math., 50, 401–419 (2014).
D. V. Zavadsky, “Shift-invariant measures on sequence spaces,” Proceedings of MIPT, 9, 142–148 (2017).
P. R. Chernoff, “Note on product formulas for operator semigroups,” J. Funct. Anal., 2, 238–242 (1968).
Yu. N. Orlov, V. Zh. Sakbaev, and E. V. Shmidt, “Operator approach to weak convergence of measures and limit theorems for random operators,” Lobachevskii J. Math., 42, 2413–2426 (2021).
V. I. Arnold, Mathematical Methods of Classical Mechanics (Graduate Texts in Mathematics, Vol. 60), Springer, New York–Heidelberg (1978).
A. Yu. Khrennikov, “Symplectic geometry on an infinite-dimensional phase space and an asymptotic representation of quantum averages by Gaussian functional integrals,” Izv. Math., 72, 127–148 (2008).
V. Zh. Sakbaev, “Random walks and measures on Hilbert space that are invariant with respect to shifts and rotations,” J. Math. Sci., 241, 469–500 (2019).
D. V. Zavadsky and V. Zh. Sakbaev, “Diffusion on a Hilbert space equipped with a shift- and rotation-invariant measure,” Proc. Steklov Inst. Math., 306, 102–119 (2019).
V. M. Busovikov and V. Zh. Sakbaev, “Sobolev spaces of functions on a Hilbert space endowed with a translation-invariant measure and approximations of semigroups,” Izv. Math., 84, 694–721 (2020).
T. Kato, Perturbation Theory for Linear Operators (Classics in Mathematics, Vol. 132), Springer, Berlin (1995).
M. Reed and B. Simon, Methods of modern mathematical physics, Vol. I: Functional analysis, Academic Press, New York–London (1972).
Yu. N. Orlov, V. Zh. Sakbaev, and O. G. Smolyanov, “Feynman formulas and the law of large numbers for random one-parameter semigroups,” Proc. Steklov Inst. Math., 306, 196–211 (2019).
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This work was supported by the Russian Science Foundation under grant No. 19-11-00320, https://rscf.ru/en/project/19-11-00320/.
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Translated from Teoreticheskaya i Matematicheskaya Fizika, 2024, Vol. 218, pp. 238–257 https://doi.org/10.4213/tmf10548.
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Busovikov, V.M., Orlov, Y.N. & Sakbaev, V.Z. Unitary representation of walks along random vector fields and the Kolmogorov–Fokker–Planck equation in a Hilbert space. Theor Math Phys 218, 205–221 (2024). https://doi.org/10.1134/S004057792402003X
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DOI: https://doi.org/10.1134/S004057792402003X