Rangarajan , SK and Sebastian, KL (1978) A matrix identity and perturbation expressions. In: Molecular Physics, 36 (2). 343-353 .Full text not available from this repository.
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|
|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|
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