The density and phase of a Gross-Pitaevskii condensate form a canonically conjugate pair, here derived from constrained dynamics instead of postulated.
Quantum theory in hydrodynamic form
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On the hydrodynamic canonical formalism of the Gross-Pitaevskii field
The density and phase of a Gross-Pitaevskii condensate form a canonically conjugate pair, here derived from constrained dynamics instead of postulated.