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- W2155346380 abstract "Phase and amplitude of the complex wave function are not independent of each other, but coupled, which becomes obvious looking at Madelung's hydrodynamic formulation of quantum mechanics. In the time-independent case, this leads to a kind of conservation law that allows for the reformulation of the linear Schrodinger equation in terms of a nonlinear Ermakov equation which is equivalent to a complex Riccati equation where the quadratic term in this equation explains the origin of the phase-amplitude coupling. A similar conservation law and corresponding nonlinear equations can also be found in the time-dependent case. The gain from the nonlinear formulations emerges when open systems with dissipation and irreversibility are considered. Describing this kind of systems by an effective nonlinear Schrodinger equation leads to a modification of the above-mentioned equations with new qualitative effects like Hopf bifurcations." @default.
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- W2155346380 date "2012-05-10" @default.
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- W2155346380 title "Nonlinear quantum mechanics, complex classical mechanics and conservation laws for closed and open systems" @default.
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- W2155346380 doi "https://doi.org/10.1088/1742-6596/361/1/012020" @default.
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