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

Pramana

G K Chaudhary1¹  R Ramakumar¹ 

[1] Department of Physics and Astrophysics, University of Delhi, Delhi 110 007, India$$

关键词: Bose–Einstein condensation;    optical lattice.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

Unknown