https://doi.org/10.1140/epjd/e2012-30179-0
Regular Article
Superfluidity and collective oscillations of trapped Bose-Einstein condensates in a periodical potential
1 Faculty of Physics, Havana University, 10400 Havana, Cuba
2 Departamento de Fisica, Universidade Federal de São Carlos, 13.565-905, São Carlos, São Paulo, Brazil
3 Physics Division, National Center for Theoretical Science, 30013 Hsinchu, Taiwan
a
e-mail: vlopez@df.ufscar.br
Received: 16 December 2011
Published online: 10 July 2012
Based on a unified theoretical treatment of the 1D Bogoliubov-de Genes equations, the superfluidity phenomenon of the Bose-Einstein condensates (BEC) loaded into trapped optical lattice is studied. Within the perturbation regime, an all-analytical framework is presented enabling a straightforward phenomenological mapping of the collective excitation and oscillation character of a trapped BEC where the available experimental configurations also fit.
Key words: Cold Matter and Quantum Gas
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2012
