1 citations · 2 across the 5 of their papers we have counts for
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Xray-Edge Spectra From Sea-Bosons-I
Girish S. Setlur
The well-studied phenomenon of X-ray edge singularities is revisited using the sea-boson approach that has recently been placed on a rigorous footing. We are able to reproduce the…
Bosonization Rules for Electron-Hole Systems - II
Girish S. Setlur
Here we write down and prove closed commutation rules for Fermi bilinears in a two-component Fermi system in terms of the relevant sea-bosons. We show how the commutation rules com…
Improved Theory of Single-Particle Properties Using Sea-bosons
Girish S. Setlur
In this article, we combine the ideas introduced by us earlier in various proportions to arrive at a simple and yet powerful means of studying single-particle properties of homogen…
Why Self-Consistent Diagrammatic Perturbation Theory is `just' Perturbation Theory
Girish S. Setlur
In this short write-up we argue that self-consistent diagrammatic perturbation theory(i.e. Feynman diagrams) for the one-particle Green function is unable to capture some important…
Corrections to the RPA Dielectric Function Induced by Fluctuations in the Momentum Distribution
Girish S. Setlur, Yia-Chung Chang
In this article, we introduce a new dielectric function that is different even from the generalised RPA, first introduced in cond-mat/9810043, in that it pays attention to fluctuat…
Computing Number Fluctuations
Girish S. Setlur, Yia-Chung Chang
Here we try and delienate the properties of the function that corresponds to fluctuations in the momentum distribution. The quantity denoted by is quite an interesti…