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• W2949614937 abstract "Transformations performing on the dependent and/or the independent variables are an useful method used to classify PDE in class of equivalence. In this paper we consider a large class of U(1)-invariant nonlinear Schrodinger equations containing complex nonlinearities. The U(1) symmetry implies the existence of a continuity equation for the particle density $rhoequiv|psi|^2$ where the current ${bfm j}_{_psi}$ has, in general, a nonlinear structure. We introduce a nonlinear gauge transformation on the dependent variables $rho$ and ${bfm j}_{psi}$ which changes the evolution equation in another one containing only a real nonlinearity and transforms the particle current ${bfm j}_{_psi}$ in the standard bilinear form. We extend the method to U(1)-invariant coupled nonlinear Schrodinger equations where the most general nonlinearity is taken into account through the sum of an Hermitian matrix and an anti-Hermitian matrix. By means of the nonlinear gauge transformation we change the nonlinear system in another one containing only a purely Hermitian nonlinearity. Finally, we consider nonlinear Schrodinger equations minimally coupled with an Abelian gauge field whose dynamics is governed, in the most general fashion, through the Maxwell-Chern-Simons equation. It is shown that the nonlinear transformation we are introducing can be applied, in this case, separately to the gauge field or to the matter field with the same final result. In conclusion, some relevant examples are presented to show the applicability of the method." @default.
• W2949614937 created "2019-06-27" @default.
• W2949614937 creator A5086499705 @default.
• W2949614937 date "2011-03-04" @default.
• W2949614937 modified "2023-09-26" @default.
• W2949614937 title "Gauge equivalence among quantum nonlinear many body systems" @default.
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• W2949614937 doi "https://doi.org/10.48550/arxiv.1103.0934" @default.
• W2949614937 hasPublicationYear "2011" @default.
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