Interaction-driven breakdown of dynamical localization in a kicked quantum gas
| Autor: | Cao, Alec, Sajjad, Roshan, Mas, Hector, Simmons, Ethan Q., Tanlimco, Jeremy L., Nolasco-Martinez, Eber, Shimasaki, Toshihiko, Kondakci, H. Esat, Galitski, Victor, Weld, David M. |
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| Rok vydání: | 2021 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41567-022-01724-7 |
| Popis: | Quantum interference can terminate energy growth in a continually kicked system, via a single-particle ergodicity-breaking mechanism known as dynamical localization. The effect of many-body interactions on dynamically localized states, while important to a fundamental understanding of quantum decoherence, has remained unexplored despite a quarter-century of experimental studies. We report the experimental realization of a tunably-interacting kicked quantum rotor ensemble using a Bose-Einstein condensate in a pulsed optical lattice. We observe signatures of a prethermal localized plateau, followed for interacting samples by interaction-induced anomalous diffusion with an exponent near one half. Echo-type time reversal experiments establish the role of interactions in destroying reversibility. These results quantitatively elucidate the dynamical transition to many-body quantum chaos, advance our understanding of quantum anomalous diffusion, and delimit some possibilities for protecting quantum information in interacting driven systems. Comment: 17 pages including supp info |
| Databáze: | arXiv |
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