Phase transitions of a Bose gas in an optical lattice
Ziegler, K.
Original · EN
A grand-canonical system of interacting bosons is considered to study phase transitions of ultracold atoms in an optical lattice. The phase diagram is discussed in terms of a matrix-like order parameter, representing a symmetric phase (Mott insulator) and a symmetry-broken phase (Bose-Einstein condensate). An exact solution was found by introducing N colors and taking the limit N→∞.
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