期刊
NEW JOURNAL OF PHYSICS
卷 18, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/18/9/093013
关键词
synthetic magnetic field; Floquet; lattice shaking
资金
- Spain's MINECO [FIS2013-41716-P]
- Real Colegio Complutense at Harvard
- MIT-Harvard Center for Ultracold Atoms
- MINECO (Severo Ochoa grant) [SEV-2015-0522]
- Catalan AGAUR [SGR 874]
- Fundacio Cellex
- FRS-FNRS Belgium
- BSPO under PAI [P7/18 DYGEST]
- MINECO (FOQUS) [FIS2013-46768]
Shaking a lattice system, by modulating the location of its sites periodically in time, is a powerful method to create effective magnetic fields in engineered quantum systems, such as cold gases trapped in optical lattices. However, such schemes are typically associated with space-dependent effective masses (tunneling amplitudes) and non-uniform flux patterns. In this work we investigate this phenomenon theoretically, by computing the effective Hamiltonians and quasienergy spectra associated with several kinds of lattice-shaking protocols. A detailed comparison with a method based on moving lattices, which are added on top of a main static optical lattice, is provided. This study allows the identification of novel shaking schemes, which simultaneously provide uniform effective mass and magnetic flux, with direct implications for cold-atom experiments and photonics.
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