In a scalar field with an unstable mode, the condensate described by the Gross-Pitaevskii equation exerts a repulsive Casimir force, and the paper computes this force and its competition with fluctuations in three exactly solvable 1+1-dimensional models.
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Casimir effect with an unstable mode
In a scalar field with an unstable mode, the condensate described by the Gross-Pitaevskii equation exerts a repulsive Casimir force, and the paper computes this force and its competition with fluctuations in three exactly solvable 1+1-dimensional models.