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Exponential approximation for the density matrix and the Wigner's distribution

โœ Scribed by M. Berkowitz

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
222 KB
Volume
129
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

It is shown that the local thermodynamic description of the ground state of a many-electron system, earlier proposed by Ghosh, Berkowitz and Parr, is equivalent to a well defined approximation for the density matrix and therefore for the Wigner's distribution.

๐Ÿ“œ SIMILAR VOLUMES

Using Krylov approximations to the matri
Using Krylov approximations to the matrix exponential operator in Davidson's method
โœ Karl Meerbergen; Miloud Sadkane ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 197 KB

This paper presents a new look at Davidson's method for the calculation of the rightmost eigenvalue(s). The combination of time-stepping by the Krylov exponential propagator and the Davidson method leads to a method that builds a Krylov space of the matrix exponential. The method is well-suited when