Transport controlled by Poincaré orbit topology in a driven inhomogeneous lattice gas
| Autor: | David Weld, Roshan Sajjad, Cora J. Fujiwara, Alec Cao, Toshihiko Shimasaki, Ethan Q. Simmons |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Quantum Physics Optical lattice Quantum gas Semiclassical physics Network topology 01 natural sciences Physics - Atomic Physics 010305 fluids & plasmas symbols.namesake Classical mechanics Lattice (order) Phase space 0103 physical sciences Poincaré conjecture Inhomogeneous field symbols Condensed Matter - Quantum Gases 010306 general physics |
| Zdroj: | Physical Review Research. 2 |
| ISSN: | 2643-1564 |
| Popis: | In periodic quantum systems which are both homogeneously tilted and driven, the interplay between drive and Bloch oscillations controls transport dynamics. Using a quantum gas in a modulated optical lattice, we show experimentally that inhomogeneity of the applied force leads to a rich new variety of dynamical behaviors controlled by the drive phase, from self-parametrically-modulated Bloch epicycles to adaptive driving of transport against a force gradient to modulation-enhanced monopole modes. Matching experimental observations to fit-parameter-free numerical predictions of time-dependent band theory, we show that these phenomena can be quantitatively understood as manifestations of an underlying inhomogeneity-induced phase space structure, in which topological classification of stroboscopic Poincar\'e orbits controls the transport dynamics. Comment: 6 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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