Optical-lattice-influenced geometry of quasi-two-dimensional binary condensates and quasiparticle spectra

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dc.contributor.author Suthar, Kuldeep
dc.contributor.author Angom, D.
dc.date.accessioned 2016-06-15T12:12:31Z
dc.date.available 2016-06-15T12:12:31Z
dc.date.issued 2016-06
dc.identifier.citation Suthar, Kuldeep and Angom, D., “Optical-lattice-influenced geometry of quasi-two-dimensional binary condensates and quasiparticle spectra”, Physical Review A, DOI: 10.1103/PhysRevA.93.063608, vol. 93, no. 6, Jun. 2016. en_US
dc.identifier.issn 2469-9926
dc.identifier.issn 2469-9934
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/2326
dc.identifier.uri http://dx.doi.org/10.1103/PhysRevA.93.063608
dc.description.abstract We explore the collective excitation of two-species Bose-Einstein condensates (TBECs) confined in quasi-two-dimensional optical lattices. For this we use a set of coupled discrete nonlinear Schrödinger equations to describe the system and we employ Hartree-Fock-Bogoliubov theory with the Popov approximation to analyze the quasiparticle spectra at zero temperature. The ground-state geometry, evolution of quasiparticle energies, structure of quasiparticle amplitudes, and dispersion relations are examined in detail. We observe that the TBEC acquires a side-by-side density profile when it is tuned from the miscible to the immiscible phase. In addition, the quasiparticle energies are softened as the system is tuned towards phase separation, but harden after phase separation and mode degeneracies are lifted. In terms of structure, in the miscible phase the quasiparticles have well-defined azimuthal quantum numbers, but that is not the case for the immiscible phase. en_US
dc.description.statementofresponsibility by K. Suthar and D. Angom
dc.format.extent vol. 93, no. 6
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.title Optical-lattice-influenced geometry of quasi-two-dimensional binary condensates and quasiparticle spectra en_US
dc.type Article en_US
dc.relation.journal Physical Review A


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