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Hysteresis in a quantized superfluid ‘atomtronic’ circuit
The results suggest that the relevant excitations involved in hysteresis are vortices, and indicate that dissipation has an important role in the dynamics.
Resistive flow in a weakly interacting Bose-Einstein condensate.
The direct observation of resistive flow through a weak link in a weakly interacting atomic Bose-Einstein condensate elucidate the microscopic origin of the dissipation and pave the way for more complex atomtronic devices.
Mechanism of stimulated Hawking radiation in a laboratory Bose-Einstein condensate
We model a sonic black hole analog in a quasi one-dimensional Bose-Einstein condensate, using a Gross-Pitaevskii equation matching the configuration of a recent experiment by Steinhauer [Nat. Phys.
Bogoliubov approach to superfluidity of atoms in an optical lattice
We use the Bogoliubov theory of atoms in an optical lattice to study the approach to the Mott-insulator transition. We derive an explicit expression for the superfluid density based on the rigidity
Temporal, Matter-Wave-Dispersion Talbot Effect
We analyze and experimentally demonstrate a new (temporal) Talbot effect, where a pulsed phase grating is applied to a cloud of cold atoms (Bose-Einstein condensate). In contrast to the usual
Superfluid transport dynamics in a capacitive atomtronic circuit
We simulate transport in an atomtronic circuit of a Bose-Einstein condensate that flows from a source region into a drain through a gate channel. The time-dependent Gross-Pitaevskii equation (GPE)
Gapless mean-field theory of Bose-Einstein condensates
We present a topical review of the development of finite-temperature field theories of Bose-Einstein condensation in weakly interacting atomic gases. We highlight the difficulties in obtaining a
Measurement of the Coherence of a Bose-Einstein Condensate
We present experimental and theoretical studies of the coherence properties of a Bose-Einstein condensate (BEC) using an interference technique. Two optical standing wave pulses of duration 100 ns
Probing the Circulation of Ring-shaped Bose-Einstein Condensates
Joint Quantum Institute, National Institute of Standards and Technologyand the University of Maryland, Gaithersburg, MD 20899, USA(Dated: January 10, 2014)This paper reports the results of a
The Bogoliubov approach to number squeezing of atoms in an optical lattice
We describe an approach for finding the number squeezing for arrays of atoms in an optical lattice. It is based on a straightforward extension of the Bogoliubov method. We discuss the conditions for