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

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      https://www.ias.ac.in/article/fulltext/pram/074/01/0011-0018

    • Keywords

       

      Bose–Einstein condensation; optical lattice.

    • Abstract

       

      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.

    • Author Affiliations

       

      G K Chaudhary1 R Ramakumar1

      1. Department of Physics and Astrophysics, University of Delhi, Delhi 110 007, India
    • Dates

       
  • Pramana – Journal of Physics | News

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