Abstract
As was repeatedly seen in the last chapter, for computing most of the usual matrix elements only a few of the many coordinates of an N-particle wavefunction are used, where due to the symmetry properties it is irrelevant which ones. Density matrices are a tool to extract the relevant information out of such monstrous constructs as are N-particle wavefunctions. (For reviews, see [Erdahl and Smith, 1987, Coleman, 1963, McWeeny, 1960]; in the text below we try to keep the notation as canonical as possible.)
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© 1996 B. G. Teubner Verlagsgesellschaft Leipzig
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Eschrig, H. (1996). Density Matrices and Density Operators. In: The Fundamentals of Density Functional Theory. TEUBNER-TEXTE zur Physik, vol 32. Vieweg+Teubner Verlag, Wiesbaden. https://doi.org/10.1007/978-3-322-97620-8_3
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DOI: https://doi.org/10.1007/978-3-322-97620-8_3
Publisher Name: Vieweg+Teubner Verlag, Wiesbaden
Print ISBN: 978-3-8154-3030-9
Online ISBN: 978-3-322-97620-8
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