AC-induced superfluidity

Abstract

We argue that a system of ultracold bosonic atoms in a tilted optical lattice can become superfluid in response to resonant AC forcing. Among others, this allows one to prepare a Bose-Einstein condensate in a state associated with a negative effective mass. Our reasoning is backed by both exact numerical simulations for systems consisting of few particles, and by a theoretical approach based on Floquet-Fock states.

Accepted for publication in Europhysics letters, 6 pages, 4 figures, Changes in v2: reference 7 replaced by a more recent one

References in corpus (9)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Cold bosonic atoms in optical lattices
• Transition from a strongly interacting 1D superfluid to a Mott insulator
• Superfluid-insulator transition in a periodically driven optical lattice
• High-temperature superfluidity of fermionic atoms in optical lattices
• The one-dimensional Bose-Hubbard Model with nearest-neighbor interaction
• Analog of photon-assisted tunneling in a Bose-Einstein condensate
• Localization Effects in ac-driven Tight-Binding Lattices
• Tuning the Mott transition in a Bose-Einstein condensate by multi-photon absorption

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• Simulations of non-Abelian gauge theories with optical lattices
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• Effective time-independent description of optical lattices with periodic driving
• Experimental realization of strong effective magnetic fields in optical superlattice potentials
• Kilohertz-driven Bose-Einstein condensates in optical lattices
• Spectroscopy for cold atom gases in periodically phase-modulated optical lattices
• Chains with loops - synthetic magnetic fluxes and topological order in one-dimensional spin systems
• Interaction-Dependent Photon-Assisted Tunneling in Optical Lattices: A Quantum Simulator of Strongly-Correlated Electrons and Dynamical Gauge Fields
• Transverse collisional instabilities of a Bose-Einstein condensate in a driven one-dimensional lattice
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• Topological Phase Transition and Charge Pumping in a One-Dimensional Periodically Driven Optical Lattice
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• Coherent perfect absorbers for transient, periodic or chaotic optical fields: time-reversed lasers beyond threshold
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• Many-body coherent destruction of tunneling in photonic lattices
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• Spin segregation via dynamically induced long-range interaction in a system of ultracold fermions
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• Dynamical decoupling and dynamical isolation in temporally modulated coupled pendulums
• Dynamics of one-dimensional tight-binding models with arbitrary time-dependent external homogeneous fields
• Resonant Spin Exchange between Heteronuclear Atoms Assisted by Periodic Driving
• Localisation Transition in the Driven Aubry-André Model
• Dynamics of a tight-binding ring threaded by time-periodic magnetic flux
• Controlled localization of interacting bosons in a disordered optical lattice
• Controllable diffusion of cold atoms in a harmonically driven and tilted optical lattice: Decoherence by spontaneous emission
• Particle-hole symmetric localization in optical lattices using time modulated random on-site potentials
• Quantum phase diagram for two species hardcore bosons in one-dimensional optical lattices with the resonantly driven Rabi frequency
• Stability of superfluids in tilted optical lattices with periodic driving