Abstract
Even for a few particles the Schrödinger equation is prohibitively difficult to solve. Hence it is important to have approximations which work in various regimes. One such approximation, which has a nice unifying theme and connects to a large area of mathematics, is the one approximating solutions of n-particle Schrödinger equations by products of n one-particle functions (i.e. functions of 3 variables). This results in a single nonlinear equation in 3 variables, or several coupled such equations. The trade-off here is the number 9 of dimensions for the nonlinearity. This method, which goes under different names, e.g. the mean-field or self-consistent approximation, is especially effective when the number of particles, n, is sufficiently large.
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© 2012 Springer-Verlag Berlin Heidelberg
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Gustafson, S.J., Sigal, I.M. (2012). Self-consistent Approximations. In: Mathematical Concepts of Quantum Mechanics. Universitext. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-21866-8_13
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DOI: https://doi.org/10.1007/978-3-642-21866-8_13
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-21865-1
Online ISBN: 978-3-642-21866-8
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