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Journal of Russian Laser Research

Chaotic dynamics of cold atoms in multidimensional optical lattices

Sergey V. Prants

Published Jul 1, 2024• 2 citations
Publisher
DOI
10.1007/s10946-024-10226-1

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We investigate a new type of quantum ratchet which may be realized by cold atoms in a double-well optical lattice, pulsed with unequal periods. The classical dynamics is chaotic and we find the classical diffusion rate D is asymmetric in momentum up to a finite time t(r). The quantum behavior produces a corresponding asymmetry in the momentum distribution which is "frozen-in" by dynamical localization provided the break time t(*)>or=t(r). We conclude that the cold atom ratchets require Db/ variant Planck's over 2pi approximately 1, where b is a small deviation from period-one pulses.