Phase coherence and fragmentation in weakly interacting bosonic gases

Details Phase coherence and fragmentation in weakly interacting bosonic gases Phase coherence and fragmentation in weakly interacting bosonic gases

2008-04-11

arxiv.org/abs/0804.1836v1

Phys. Rev. A 77, 041605(R) (2008)

Physics

Condensed Matter

Statistical Mechanics

5 pages

Scientific paper

10.1103/PhysRevA.77.041605

We present a theory of measurement-induced interference for weakly interacting Bose-Einstein condensed (BEC) gases. The many-body state resulting from the evolution of an initial fragmented (Fock) state can be approximated as a continuous superposition of Gross-Pitaevskii (GP) states; the measurement breaks the initial phase symmetry, producing a distribution pattern corresponding to only one of the GP solutions. We discuss also analytically solvable models, such as two-mode on-chip adiabatic recombination and soliton generation in quasi one-dimensional condensates.

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