Beyond effective Hamiltonians: micromotion of Bose Einstein condensates in periodically driven optical lattices
arXiv:1910.00661 · doi:10.1103/PhysRevA.101.013619
Abstract
We investigate a Bose Einstein condensate held in a 1D optical lattice whose phase undergoes a fast oscillation using a statistical analysis. The averaged potential experienced by the atoms boils down to a periodic potential having the same spatial period but with a renormalized depth. However, the atomic dynamics also contains a \emph{micromotion} whose main features are revealed by a Kolmorogov-Smirnov analysis of the experimental momentum distributions. We furthermore discuss the impact of the micromotion on a quench process corresponding to a proper sudden change of the driving amplitude which reverses the curvature of the averaged potential.
Our preprint 1804.02147v1 [cond-mat.quant-gas] has triggered this study dedicated to the micromotion hidden behind effective Hamiltonians generated by fast time-modulation of a parameter
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Cited by in corpus (4)
- Harmonic dual dressing of spin one-half systems
- Emission of particles from a parametrically driven condensate in a one-dimensional lattice
- Asymmetric dynamical localization and precision measurement of BEC micromotion
- Dynamics of Momentum Distribution and Structure Factor in a Weakly Interacting Bose Gas with a Periodical Modulation