Formation and dynamics of manyboson fragmented states in attractive onedimensional ultracold gases
Abstract
Dynamics of attractive ultracold bosonic clouds in one dimension are studied by solving the manyparticle timedependent Schrödinger equation. The initially coherent wavepacket can dynamically dissociate into two parts when its energy exceeds a threshold value. Noticeably, the timedependent GrossPitaevskii theory applied to the same initial state does not show up the splitting. We call the split object {\it fragmenton}. It possesses remarkable properties: (1) it is twofold fragmented, i.e., not coherent; (2) it is dynamically stable, i.e., it propagates almost without dispersion; (3) it is delocalized, i.e., the two dissociated parts still communicate with one another. A simple static model predicts the existence of fragmented states which are responsible for formation and dynamics of fragmentons.
 Publication:

arXiv eprints
 Pub Date:
 November 2007
 arXiv:
 arXiv:0711.2778
 Bibcode:
 2007arXiv0711.2778S
 Keywords:

 Condensed Matter  Other Condensed Matter
 EPrint:
 11 pages, 3 figures