Resonant excitations of a Bose Einstein condensate in an optical lattice

Abstract

We investigate experimentally a Bose Einstein condensate placed in a 1D optical lattice whose phase or amplitude is modulated in a frequency range resonant with the first bands of the band structure. We study the combined effect of the strength of interactions and external confinement on the 1 and 2-phonon transitions. We identify lines immune or sensitive to atom-atom interactions. Experimental results are in good agreement with numerical simulations. Using the band mapping technique, we get a direct access to the populations that have undergone $n$-phonon transitions for each modulation frequency.

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Cited by in corpus (8)

• Quantum state control of a Bose-Einstein condensate in an optical lattice
• Parametric instabilities of interacting bosons in periodically-driven 1D optical lattices
• Suppressing dissipation in a Floquet-Hubbard system
• Chaos-assisted tunneling resonances in a synthetic Floquet superlattice
• Floquet engineering of individual band gaps in an optical lattice using a two-tone drive
• Beyond effective Hamiltonians: micromotion of Bose Einstein condensates in periodically driven optical lattices
• Emission of particles from a parametrically driven condensate in a one-dimensional lattice
• $p$-band stability of ultracold atom gas in anharmonic optical lattice potential with large energy scales