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Observations on Sound Propagation in Rapidly Rotating Bose-Einstein Condensates
T. P. Simula, P. Engels, I. Coddington +3
Repulsive laser potential pulses applied to vortex lattices of rapidly rotating Bose-Einstein condensates create propagating density waves which we have observed experimentally and…
Experimental studies of equilibrium vortex properties in a Bose-condensed gas
I. Coddington, P. C. Haljan, P. Engels +3
We characterize several equilibrium vortex effects in a rotating Bose-Einstein condensate. Specifically we attempt precision measurements of vortex lattice spacing and the vortex c…
Observation of Tkachenko Oscillations in Rapidly Rotating Bose-Einstein Condensates
I. Coddington, P. Engels, V. Schweikhard +1
We directly image Tkachenko waves in a vortex lattice in a dilute-gas Bose-Einstein condensate. The low (sub-Hz) resonant frequencies are a consequence of the small but nonvanishin…
Observation of Long-lived Vortex Aggregates in Rapidly Rotating Bose-Einstein Condensates
P. Engels, I. Coddington, P. C. Haljan +2
We study the formation of large vortex aggregates in a rapidly rotating dilute-gas Bose-Einstein condensate. When we remove atoms from the rotating condensate with a tightly focuse…