Acoustic radiation from vortex-barrier interaction in atomic Bose-Einstein condensate

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dc.contributor.author Suthar, Kuldeep
dc.contributor.author Roy, Arko
dc.contributor.author Angom, D.
dc.date.accessioned 2015-04-24T12:57:16Z
dc.date.available 2015-04-24T12:57:16Z
dc.date.issued 2014-05
dc.identifier.citation Suthar, Kuldeep; Roy, Arko and D., Angom, “Acoustic radiation from vortex-barrier interaction in atomic Bose-Einstein condensate”, arXiv, Cornell University Library, DOI: arXiv:1312.7811, May. 2014. en_US
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/1705
dc.description.abstract We examine the dynamics of a vortex dipole in the Bose-Einstein condensates (BECs) of trapped dilute atomic gases at zero temperature in the presence of a Gaussian barrier potential. The density-anisotropy induced by the barrier enhances the acoustic radiation from the vortex dipole. This is due to the deviation of the condensate density from the equipotential curves and variation in the curvature of the vortex dipole trajectory. Due to the acoustic radiation, the vortex dipole dissipates energy and spirals towards the edge of the condensate. As a result, we observe an increase in the vortex-antivortex annihilation events. To examine the effect of the Gaussian barrier, we estimate the correction to the Thomas-Fermi condensate density using perturbation expansion method and the results are in very good agreement with the numerical results. en_US
dc.description.statementofresponsibility by Kuldeep Suthar, Arko Roy and Angom D.
dc.language.iso en en_US
dc.publisher Cornell University Library en_US
dc.subject Equipotential en_US
dc.subject Quantum Gase en_US
dc.subject Vortex-antivortex en_US
dc.title Acoustic radiation from vortex-barrier interaction in atomic Bose-Einstein condensate en_US
dc.type Preprint en_US


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