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- W2001924452 abstract "The semiclassical description of the dynamics of wave packets in periodic potentials and subject to an applied force relies on the concepts of effective mass and anomalous transport. This picture is valid if the force changes slowly in time and space, so that the particle described by the wave packet has time to respond according to the properties of the lattice. We analyze the dynamical corrections to this picture when a uniform force is suddenly applied, identifying separate corrections to the usual group and anomalous velocities. We find approximate semianalytical expressions for generalized dynamical group and anomalous velocities, and the associated accelerations. We use a two-dimensional optical lattice with finite Berry curvature to illustrate the semianalytical approximation in a regime where the dynamical corrections are significant, suggesting the possibility of experiments to detect them; we compare the results with a full numerical solution, showing excellent agreement for weak forces." @default.
- W2001924452 created "2016-06-24" @default.
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- W2001924452 date "2014-11-06" @default.
- W2001924452 modified "2023-10-03" @default.
- W2001924452 title "Dynamics of the effective mass and the anomalous velocity in two-dimensional lattices" @default.
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- W2001924452 doi "https://doi.org/10.1103/physreva.90.053407" @default.
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