Floquet Engineering a Bosonic Josephson Junction
Si-Cong Ji, Thomas Schweigler, Mohammadamin Tajik, Federica Cataldini, João Sabino, Frederik Møller, Sebastian Erne, Jörg Schmiedmayer
Abstract
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.
Topics & Concepts
Floquet theoryHamiltonian (control theory)PhysicsUncorrelatedAmplitudeCoherence (philosophical gambling strategy)Quantum mechanicsJosephson effectSineCoupling (piping)Condensed matter physicsSuperconductivityMaterials scienceNonlinear systemMathematicsMetallurgyMathematical optimizationGeometryStatisticsCold Atom Physics and Bose-Einstein CondensatesQuantum, superfluid, helium dynamicsQuantum many-body systems