Creation of a Dirac monopole-antimonopole pair in a spin-1 Bose-Einstein condensate

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dc.contributor University of Helsinki, Materials Physics en Tiurev, Konstantin Kuopanportti, Pekko Möttönen, Mikko 2019-12-17T11:18:01Z 2019-12-17T11:18:01Z 2019-02-19
dc.identifier.citation Tiurev , K , Kuopanportti , P & Möttönen , M 2019 , ' Creation of a Dirac monopole-antimonopole pair in a spin-1 Bose-Einstein condensate ' , Physical Review A , vol. 99 , no. 2 , 023621 . en
dc.identifier.issn 2469-9926
dc.identifier.other PURE: 123262774
dc.identifier.other PURE UUID: 570fb64d-2a63-414d-a44a-de922c43a855
dc.identifier.other WOS: 000459199600012
dc.identifier.other Scopus: 85062288807
dc.description.abstract We theoretically demonstrate that a pair of Dirac monopoles with opposite synthetic charges can be created within a single spin-1 Bose-Einstein condensate by steering the spin degrees of freedom by external magnetic fields. Although the net synthetic magnetic charge of this configuration vanishes, both the monopole and the antimonopole are accompanied by vortex filaments carrying opposite angular momenta. Such a Dirac dipole can be realized experimentally by imprinting a spin texture with a nonlinear magnetic field generated by a pair of coils in a modified Helmholtz configuration. We also investigate the case where the initial state for the dipole-creation procedure is pierced by a quantized vortex line with a winding number kappa. It is shown that if kappa = -1, the resulting monopole and antimonopole lie along the core of a singly quantized vortex whose sign is reversed at the locations of the monopoles. For kappa = -2, the monopole and antimonopole are connected by a vortex line segment carrying two quanta of angular momentum, and hence the dipole as a whole is an isolated configuration. In addition, we simulate the long-time evolution of the dipoles in the magnetic field used to create them. For kappa = 0, each of the semi-infinite doubly quantized vortices splits into two singly quantized vortices, as in the case of a single Dirac monopole. For kappa = -1 and kappa = -2, the initial vortices deform into a vortex with a kink and a vortex ring, respectively. en
dc.format.extent 7
dc.language.iso eng
dc.relation.ispartof Physical Review A
dc.rights en
dc.subject SEARCH en
dc.subject COLLISIONS en
dc.subject FIELD en
dc.subject 114 Physical sciences en
dc.title Creation of a Dirac monopole-antimonopole pair in a spin-1 Bose-Einstein condensate en
dc.type Article
dc.description.version Peer reviewed
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion

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