We investigate the coherence properties of an array of one-dimensional Bose gases with short-scale phase fluctuations. The momentum distribution is measured using Bragg spectroscopy, and an effective coherence length of the whole ensemble is defined. In addition, we propose and demonstrate that time-of-flight absorption imaging can be used as a simple probe to directly measure the coherence length of one-dimensional gases in the regime where phase fluctuations are strong. This method is suitable for future studies such as investigating the effect of disorder on the phase coherence.
Momentum-resolved study of an array of one-dimensional strongly phase-fluctuating Bose gases / N. Fabbri; D. Clément; L. Fallani; C. Fort; and M. Inguscio. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 83:(2011), pp. 031604-1-031604-4. [10.1103/PhysRevA.83.031604]
Momentum-resolved study of an array of one-dimensional strongly phase-fluctuating Bose gases
FABBRI, NICOLE;FALLANI, LEONARDO;FORT, CHIARA;INGUSCIO, MASSIMO
2011
Abstract
We investigate the coherence properties of an array of one-dimensional Bose gases with short-scale phase fluctuations. The momentum distribution is measured using Bragg spectroscopy, and an effective coherence length of the whole ensemble is defined. In addition, we propose and demonstrate that time-of-flight absorption imaging can be used as a simple probe to directly measure the coherence length of one-dimensional gases in the regime where phase fluctuations are strong. This method is suitable for future studies such as investigating the effect of disorder on the phase coherence.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.