Symmetry Breaking and Enhanced Condensate Fraction in a Matter-Wave Bright Soliton

Details Symmetry Breaking and Enhanced Condensate Fraction in a Matter-Wave Bright Soliton Symmetry Breaking and Enhanced Condensate Fraction in a Matter-Wave Bright Soliton

2004-06-30

arxiv.org/abs/cond-mat/0406740v2

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.

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