Phase transition, entanglement and squeezing in a triple-well condensate

Occupational Husimi representation (left) and phase distribution (right) of the ground state for N = 30, Ω = −1, μ = 0 and self-collision parameter values: (a) χ=0, (b) χ=2 and (c) χ=3. In (b) we observe the squeezing in phase while the distribution in number broadens. The fragmentation of the phase in (c) characterizes a Quantum Phase Transition.  See more in Europhysics Letters 90, 10014 (2010).

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