200 citations · 583 across the 31 of their papers we have counts for
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Rotating Bose-Einstein Condensates with a large number of Vortices
V. Subrahmanyam
We study a harmonically-confined Bose-Einstein condensate under rotation. Vortex lattice configurations are investigated through a variational approach. Vortices with more than a u…
Nagaoka State and Degeneracy in the U=infinity Hubbard Model
V. Subrahmanyam, Fajian Shi
The U=infinity Hubbard model on a hypercubic lattice with exactly one hole is studied. It is seen that a degeneracy can occur in the maximal-spin sector. It is proved variationally…
Effective chiral-spin Hamiltonian for odd-numbered coupled Heisenberg chains
V. Subrahmanyam
An system of odd number of coupled Heisenberg spin chains is studied using a degenerate perturbation theory, where is the number of coupled chains. An effecti…
Block spins and Chirality in Heisenberg model on Kagome and triangular lattices
V. Subrahmanyam
The Spin-1/2 Heisenberg Model (HM) is investigated using a block-spin renormalization approach on Kagome and triangular lattices. In both cases, after coarse graining the triangles…
The Chirality operators for Heisenberg Spin Systems
V. Subrahmanyam
The ground state of closed Heisenberg spin chains with an odd number of sites has a chiral degeneracy, in addition to a two-fold Kramers degeneracy. A non-zero chirality implies th…