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

• # Fulltext

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

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

• # Pramana – Journal of Physics

Volume 94, 2020
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Posted on July 25, 2019

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