Rangarajan , SK and Sebastian, KL (1978) A matrix identity and perturbation expressions. In: Molecular Physics, 36 (2). 343-353 .
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Abstract
An identity expressing formally the diagonal and off-diagonal elements of an inverse of a matrix is deduced employing operator techniques. Several well-known perturbation expressions for the self-energy are deduced as special cases. A new approximation and other applications following from the above formalism are briefly indicated through illustrations from a perturbed harmonic oscillator, chemisorption approximations and Kelly's result in the problem of electron correlation.
| Item Type: | Journal Article |
|---|---|
| Publication: | Molecular Physics |
| Publisher: | Taylor and Francis Group |
| Additional Information: | Copyright of this article belong to Taylor and Francis Group. |
| Department/Centre: | Division of Chemical Sciences > Inorganic & Physical Chemistry |
| Date Deposited: | 23 Sep 2010 09:57 |
| Last Modified: | 23 Sep 2010 09:57 |
| URI: | http://eprints.iisc.ac.in/id/eprint/32361 |
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