17 citations · 88 across the 43 of their papers we have counts for
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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…
Myopic Bosonization
Girish S. Setlur
As the title suggests, this is an attempt at bosonizing fermions in any number of dimensions without paying attention to the fact that the Fermi surface is an extended object. One…
Exact Single-Particle Green Functions of Fermi Systems Without Using Bosonization or Are Hartree-Fock and Random Phase Approximations 'Controlled Approximations' ?
Girish S. Setlur, Yia-Chung Chang
In this article, we revisit the question of the validity of Hartree-Fock and random-phase approximations. We show that there is a connection between the two and while the RPA as it…
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…
Energy Levels of Multielectron Atoms using the Sea-boson Method
Girish S. Setlur, Yia-Chung Chang
In this article, we study an antithesis of the homogeneous Fermi system (jellium model) namely a single multielectron atom using the sea-boson approach. This system in addition to…
Momentum Distribution of the Hubbard Model
Girish S. Setlur
Using the recently perfected sea-boson method, we compute the momentum distribution of the one-band Hubbard model in one and two spatial dimensions. We compute the asymptotic featu…