17 citations · 88 across the 43 of their papers we have counts for
13 papers · 1 filter
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…
Calculus of Sea-Displacement Operators
Girish S. Setlur, D. S. Citrin
Sea-Displacement Operators for fermions are defined in terms of the Fermi fields in a one-component Fermi system. The main conclusions of this article fully corroborate the conject…
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…