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In theoretical physics, the logarithmic Schrödinger equation (sometimes abbreviated as LNSE or LogSE) is one of the nonlinear modifications of Schrödinger's equation. It is a classical wave equation with applications to extensions of quantum mechanics,[1] quantum optics,[2] nuclear physics,[3][4] transport and diffusion phenomena,[5][6] open quantum systems and information theory,[7][8][9][10][11][12] effective quantum gravity and physical vacuum models[13][14][15] and theory of superfluidity and Bose–Einstein condensation.[16] Its relativistic version (with D'Alembertian instead of Laplacian and first-order time derivative) was first proposed by G. Rosen.[17] It is an example of an integrable model.

The equation

The logarithmic Schrödinger equation is the partial differential equation. In mathematics and mathematical physics one often uses its dimensionless form:

iψt+Δψ+ψln|ψ|2=0.

for the complex-valued function ψ=ψ(x,t). Here Δ is the Laplacian with respect to the vector x.

The relativistic version of this equation can be obtained by replacing the derivative operator with the D'Alembertian, similarly to the Klein-Gordon equation.

See also

References

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External links



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  1. I. Bialynicki-Birula and J. Mycielski, Annals Phys. 100, 62 (1976); Commun. Math. Phys. 44, 129 (1975); Phys. Scripta 20, 539 (1979).
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