Fluctuation-driven topological transition of binary condensates in optical lattices

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dc.contributor.author Suthar, Kuldeep
dc.contributor.author Roy, Arko
dc.contributor.author Angom, D.
dc.date.accessioned 2015-04-25T16:31:27Z
dc.date.available 2015-04-25T16:31:27Z
dc.date.issued 2015-04
dc.identifier.citation Suthar, Kuldeep; Roy, Arko and Angom, D. “Fluctuation-driven topological transition of binary condensates in optical lattices”, Physical Review A, DOI: 10.1103/PhysRevA.91.043615, vol. 91, no. 4, Apr. 2015 en_US
dc.identifier.issn 1538-4446
dc.identifier.uri http://dx.doi.org/10.1103/PhysRevA.91.043615
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/1709
dc.description.abstract We show the emergence of a third Goldstone mode in binary condensates at phase separation in quasi-one-dimensional (quasi-1D) optical lattices. We develop the coupled discrete nonlinear Schrödinger equations using Hartree-Fock-Bogoliubov theory with the Popov approximation in the Bose-Hubbard model to investigate the mode evolution at zero temperature, in particular, as the system is driven from the miscible to the immiscible phase. We demonstrate that the position exchange of the species in the Rb87−Rb85 system is accompanied by a discontinuity in the excitation spectrum. Our results show that, in quasi-1D optical lattices, the presence of the fluctuations dramatically changes the geometry of the ground-state density profile of two-component Bose-Einstein condensates. en_US
dc.description.statementofresponsibility by Kuldeep Suthar, Arko Roy and Angom D.
dc.format.extent vol. 91, no. 4 vol. 91, no. 4
dc.language.iso en en_US
dc.publisher American Physical Society en_US
dc.subject Bose-Einstein condensates en_US
dc.subject Goldstone mode en_US
dc.subject Hartree-Fock-Bogoliubov theory en_US
dc.title Fluctuation-driven topological transition of binary condensates in optical lattices en_US
dc.type Article en_US
dc.relation.journal Physical Review A


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