Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2004-06-30
Phys. Rev. Lett. 94, 090404 (2005)
Physics
Condensed Matter
Other Condensed Matter
4 pages, 4 figures, revised version
Scientific paper
10.1103/PhysRevLett.94.090404
An exact diagonalization study reveals that a matter-wave bright soliton and the Goldstone mode are simultaneously created in a quasi-one-dimensional attractive Bose-Einstein condensate by superpositions of quasi-degenerate low-lying many-body states. Upon formation of the soliton the maximum eigenvalue of the single-particle density matrix increases dramatically, indicating that a fragmented condensate converts into a single condensate as a consequence of the breaking of translation symmetry.
Kanamoto Rina
Saito Hiroki
Ueda Masahito
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