Coherent single atom shuttle between two Bose-Einstein condensates

Abstract

We study an atomic quantum dot representing a single hyperfine "impurity" atom which is coherently coupled to two well-separated Bose-Einstein condensates, in the limit when the coupling between the dot and the condensates dominates the inter-condensate tunneling coupling. It is demonstrated that the quantum dot by itself can induce large-amplitude Josephson-like oscillations of the particle imbalance between the condensates, which display a two-frequency behavior. For noninteracting condensates, we provide an approximate solution to the coupled nonlinear equations of motion which allows us to obtain these two frequencies analytically.

4 pages of RevTex4, 4 figures; Rapid Communication in Physical Review A

References in corpus (7)

• Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction
• Quantum Coherent Atomic Tunneling between Two Trapped Bose-Einstein Condensates
• Josephson effect between trapped Bose-Einstein condensates
• Nonlinear Self-Trapping of Matter Waves in Periodic Potentials
• 39-K Bose-Einstein condensate with tunable interactions
• Atomic quantum dots coupled to BEC reservoirs
• A Quantum Top Inside a Bose Josephson Junction

Cited by in corpus (16)

• Quantum dynamics of an atomic double-well system interacting with a trapped ion
• Competition between symmetry breaking and onset of collapse in weakly coupled atomic condensates
• Inter-species Tunneling in One-dimensional Bose Mixtures
• Impurity in a bosonic Josephson junction: swallowtail loops, chaos, self-trapping and the poor man's Dicke model
• Dynamics of Rogue Wave Excitation Pattern on Stripe Phase Backgrounds in a Two-component Bose-Einstein Condensate
• Impurity in a Bose-Einstein condensate in a double well
• Tunneling dynamics of bosonic Josephson junctions assisted by a cavity field
• State engineering of impurities in a lattice by coupling to a Bose gas
• Dissipative Bose-Josephson junction coupled to bosonic baths
• Critical exponents for an impurity in a bosonic Josephson junction: Position measurement as a phase transition
• Interaction-controlled impurity transport in trapped mixtures of ultracold bosons
• Nonequilibrium properties of an atomic quantum dot coupled to a Bose-Einstein condensate
• Two atomic quantum dots interacting via coupling to BECs
• Topologically protected Bell-cat states in a simple spin model
• Dynamical formation of two-fold fragmented many-body state induced by an impurity in a double-well
• Manipulating the Mott lobes: optical lattice bosons coupled to an array of atomic quantum dots