We study Floquet engineering of the tunnel coupling between a pair of one-dimensional bosonic quasicondensates in a tilted double-well potential. By modulating the energy difference between the two wells, we reestablish tunnel coupling and precisely control its amplitude and phase. This allows us to initiate coherence between two initially uncorrelated Bose gases and prepare different initial states in the emerging sine-Gordon Hamiltonian. We fully characterize the Floquet system and study the dependence of both equilibrium properties and relaxation on the modulation.

S.-C. Ji, T. Schweigler, M. Tajik, F. Cataldini, J. Sabino, F. S. Møller, S. Erne, J. Schmiedmayer, “Floquet engineering a bosonic josephson junction”, Phys. Rev. Lett. 129, 080402 (2022).


Related to Project A03