553 citations · 3.7k across the 24 of their papers we have counts for
7 papers · 1 filter
A rapidly expanding Bose-Einstein condensate: an expanding universe in the lab
S. Eckel, A. Kumar, T. Jacobson +2
We study the dynamics of a supersonically expanding ring-shaped Bose-Einstein condensate both experimentally and theoretically. The expansion redshifts long-wavelength excitations,…
Temperature induced decay of persistent currents in a superfluid ultracold gas
Avinash Kumar, Stephen Eckel, Fred Jendrzejewski +1
We study how temperature affects the lifetime of a quantized, persistent current state in a toroidal Bose-Einstein condensate (BEC). When the temperature is increased, we find a de…
A 3-photon process for producing a degenerate gas of metastable alkaline-earth atoms
D. S. Barker, N. C. Pisenti, B. J. Reschovsky +1
We present a method for creating a quantum degenerate gas of metastable alkaline-earth atoms. This has yet to be achieved due to inelastic collisions that limit evaporative cooling…
Contact resistance and phase slips in mesoscopic superfluid atom transport
S. Eckel, Jeffrey G. Lee, F. Jendrzejewski +3
We have experimentally measured transport of superfluid, bosonic atoms in a mesoscopic system: a small channel connecting two large reservoirs. Starting far from equilibrium (super…
Hysteresis in a quantized, superfluid atomtronic circuit
Stephen Eckel, Jeffrey G. Lee, Fred Jendrzejewski +6
Atomtronics is an emerging interdisciplinary field that seeks new functionality by creating devices and circuits where ultra-cold atoms, often superfluids, play a role analogous to…
Driving phase slips in a superfluid atom circuit with a rotating weak link
K. C. Wright, R. B. Blakestad, C. J. Lobb +2
We have observed well-defined phase slips between quantized persistent current states around a toroidal atomic (23Na) Bose-Einstein condensate. These phase slips are induced by a w…
Superflow in a toroidal Bose-Einstein condensate: an atom circuit with a tunable weak link
A. Ramanathan, K. C. Wright, S. R. Muniz +6
We have created a long-lived (~ 40 s) persistent current in a toroidal Bose-Einstein condensate held in an all-optical trap. A repulsive optical barrier creates a tunable weak link…