4 papers
Collective excitation of Bose-Einstein condensates in the transition region between 3D and 1D
M. Kottke, T. Schulte, L. Cacciapuoti +4
We measure the frequency of the low m=0 quadrupolar excitation mode of weakly interacting Bose-Einstein condensates in the transition region from the 3D to the 1D mean-field regime…
Second Order Correlation Function of a Phase Fluctuating Bose-Einstein Condensate
L. Cacciapuoti, D. Hellweg, M. Kottke +6
The coherence properties of phase fluctuating Bose-Einstein condensates are studied both theoretically and experimentally. We derive a general expression for the N-particle correla…
Measurement of the Spatial Correlation Function of Phase Fluctuating Bose-Einstein Condensates
D. Hellweg, L. Cacciapuoti, M. Kottke +4
We measure the intensity correlation function of two interfering spatially displaced copies of a phase fluctuating Bose-Einstein Condensate (BEC). It is shown that this corresponds…
Characterization and control of phase fluctuations in elongated Bose-Einstein condensates
H. Kreutzmann, A. Sanpera, L. Santos +7
Quasi one dimensional Bose-Einstein condensates (BECs) in elongated traps exhibit significant phase fluctuations even at very low temperatures. We present recent experimental resul…