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- W4226192503 abstract "Motivated by the research on upper bounds on the rate of quantum transport for one-dimensional operators, particularly, the recent works of Jitomirskaya--Liu and Jitomirskaya--Powell and the earlier ones of Damanik--Tcheremchantsev, we propose a method to prove similar bounds in arbitrary dimension. The method applies both to Schroedinger and to long-range operators. In the case of ergodic operators, one can use large deviation estimates for the Green function in finite volumes to verify the assumptions of our general theorem. Such estimates have been proved for numerous classes of quasiperiodic operators in one and higher dimension, starting from the works of Bourgain, Goldstein, and Schlag. One of the applications is a power-logarithmic bound on the quantum transport defined by a multidimensional discrete Schrodinger (or even long-range) operator associated with an irrational shift, valid for all Diophantine frequencies and uniformly for all phases. To the best of our knowledge, these are the first results on the quantum dynamics for quasiperiodic operators in dimension greater than one that do not require exclusion of a positive measure of phases. Moreover, and in contrast to localisation, the estimates are uniform in the phase. The arguments are also applicable to ergodic operators corresponding to other kinds of base dynamics, such as the skew-shift." @default.
- W4226192503 created "2022-05-05" @default.
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- W4226192503 date "2021-11-21" @default.
- W4226192503 modified "2023-09-29" @default.
- W4226192503 title "Upper bounds on quantum dynamics in arbitrary dimension" @default.
- W4226192503 hasPublicationYear "2021" @default.
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