9 citations · 27 across the 4 of their papers we have counts for
5 papers
Thermodynamic properties of Holstein polarons and the effects of disorder
A. N. Das, S. Sil
The ground state and finite temperature properties of polarons are studied considering a two-site and a four-site Holstein model by exact diagonalization of the Hamiltonian. The ki…
Lattice bosons in quartic confinement
R. Ramakumar, A. N. Das
We present a theoretical study of bose condensation of non-interacting bosons in finite lattices in quartic potentials in one, two, and three dimensions. We investigate dimensional…
Polaron cross-overs and d-wave superconductivity in Hubbard-Holstein model
R. Ramakumar, A. N. Das
We present a theoretical study of superconductivity of polarons in the Hubbard-Holstein model. A residual kinematic interaction proportional to the square of the polaron hopping en…
Studies of bosons in optical lattices in a harmonic potential
R. Ramakumar, A. N. Das, S. Sil
We present a theoretical study of bose condensation and specific heat of non-interacting bosons in finite lattices in harmonic potentials in one, two, and three dimensions. We nume…
Bose-Einstein condensation in tight-binding bands
R. Ramakumar, A. N. Das
We present a theoretical study of condensation of bosons in tight binding bands corresponding to simple cubic, body centered cubic, and face centered cubic lattices. We have analyz…