• R Ramakumar

      Articles written in Pramana – Journal of Physics

    • The effects of next-to-nearest-neighbour hopping on Bose–Einstein condensation in cubic lattices

      G K Chaudhary R Ramakumar

      More Details Abstract Fulltext PDF

      In this paper, we present results of our calculations on the effects of next-to-nearest-neighbour boson hopping ($t'$) energy on Bose–Einstein condensation in cubic lattices. We consider both non-interacting and repulsively interacting bosons moving in the lowest Bloch band. The interacting bosons are studied using Bogoliubov method. We find that the Bose condensation temperature is enhanced by increasing $t'$ for bosons in a simple cubic (sc) lattice and decreases for bosons in body-centred cubic (bcc) and face-centred cubic (fcc) lattices. We also find that interaction-induced depletion of the condensate is reduced for bosons in an sc lattice while it is enhanced for bosons in bcc and fcc lattices.

  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.