Ultracold Lattice Gases with Periodically Modulated Interactions

Abstract

We show that a time-dependent magnetic field inducing a periodically modulated scattering length may lead to interesting novel scenarios for cold gases in optical lattices, characterized by a nonlinear hopping depending on the number difference at neighboring sites. We discuss the rich physics introduced by this hopping, including pair superfluidity, exactly defect-free Mott-insulator states for finite hopping, and pure holon and doublon superfluids. We also address experimental detection, showing that the introduced nonlinear hopping may lead in harmonically trapped gases to abrupt drops in the density profile marking the interface between different superfluid regions.

final version, 5 pages, 4 figures

References in corpus (10)

• Many-Body Physics with Ultracold Gases
• Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Classical simulation of infinite-size quantum lattice systems in one spatial dimension
• Dynamical control of matter-wave tunneling in periodic potentials
• Coherent control of dressed matter waves
• Single Particle Tunneling in Strongly Driven Double Well Potentials
• Collective excitation of a Bose-Einstein condensate by modulation of the atomic scattering length
• Bose-Hubbard model with occupation dependent parameters
• Single-particle versus pair condensation of hard-core bosons with correlated hopping

Cited by in corpus (15)

• Periodically-driven quantum systems: Effective Hamiltonians and engineered gauge fields
• Non-standard Hubbard models in optical lattices: a review
• Collective emission of matter-wave jets from driven Bose-Einstein condensates
• Effects of interactions on periodically driven dynamically localized systems
• Exploring Unconventional Hubbard Models with Doubly Modulated Lattice Gases
• Non-Abelian SU(N-1)-singlet fractional quantum Hall states from coupled wires
• Perfect spin filter by periodic drive of a ferromagnetic quantum barrier
• Superfluidity of strongly correlated bosons in two- and three-dimensional traps
• Effects of local periodic driving on transport and generation of bound states
• Ultracold fermions in a one-dimensional bipartite optical lattice: metal-insulator transitions driven by shaking
• Compacton matter waves in binary Bose gases under strong nonlinear management
• Synthetic Random Flux Model in a periodically-driven optical lattice
• Laser assisted tunneling in a Tonks-Girardeau gas
• Binary matter-wave compactons induced by inter-species scattering length modulations
• Emergent long-range interaction and state-selective localization in a strongly driven $XXZ$ model