Making ghost vortices visible in two-component Bose-Einstein condensates
Ghost vortices constitute an elusive class of topological excitations in quantum fluids since the relevant phase singularities fall within regions where the superfluid density is almost zero. Here we present a platform that allows for the controlled generation and observation of such vortices. Upon...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2023-05-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.023109 |
| _version_ | 1797210423268737024 |
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| author | Andrii Chaika Andrea Richaud Alexander Yakimenko |
| author_facet | Andrii Chaika Andrea Richaud Alexander Yakimenko |
| author_sort | Andrii Chaika |
| collection | DOAJ |
| description | Ghost vortices constitute an elusive class of topological excitations in quantum fluids since the relevant phase singularities fall within regions where the superfluid density is almost zero. Here we present a platform that allows for the controlled generation and observation of such vortices. Upon rotating an imbalanced mixture of two-component Bose-Einstein condensates, one can obtain necklaces of real vortices in the majority component whose cores get filled by particles from the minority one. The wave function describing the state of the latter is shown to harbor a number of ghost vortices which are crucial to support the overall dynamics of the mixture. Their arrangement typically mirrors that of their real counterpart, hence resulting in a “dual” ghost-vortex necklace, whose properties are thoroughly investigated in the present paper. We also present a viable experimental protocol for the direct observation of ghost vortices in a ^{23}Na+^{39}K ultracold mixture. Quenching the intercomponent scattering length, some atoms are expelled from the vortex cores and, while diffusing, swirl around unpopulated phase singularities, thus turning them directly observable. |
| first_indexed | 2024-04-24T10:10:21Z |
| format | Article |
| id | doaj.art-1bf804a842c743b5912e3fb88bda7ce2 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:10:21Z |
| publishDate | 2023-05-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-1bf804a842c743b5912e3fb88bda7ce22024-04-12T17:31:02ZengAmerican Physical SocietyPhysical Review Research2643-15642023-05-015202310910.1103/PhysRevResearch.5.023109Making ghost vortices visible in two-component Bose-Einstein condensatesAndrii ChaikaAndrea RichaudAlexander YakimenkoGhost vortices constitute an elusive class of topological excitations in quantum fluids since the relevant phase singularities fall within regions where the superfluid density is almost zero. Here we present a platform that allows for the controlled generation and observation of such vortices. Upon rotating an imbalanced mixture of two-component Bose-Einstein condensates, one can obtain necklaces of real vortices in the majority component whose cores get filled by particles from the minority one. The wave function describing the state of the latter is shown to harbor a number of ghost vortices which are crucial to support the overall dynamics of the mixture. Their arrangement typically mirrors that of their real counterpart, hence resulting in a “dual” ghost-vortex necklace, whose properties are thoroughly investigated in the present paper. We also present a viable experimental protocol for the direct observation of ghost vortices in a ^{23}Na+^{39}K ultracold mixture. Quenching the intercomponent scattering length, some atoms are expelled from the vortex cores and, while diffusing, swirl around unpopulated phase singularities, thus turning them directly observable.http://doi.org/10.1103/PhysRevResearch.5.023109 |
| spellingShingle | Andrii Chaika Andrea Richaud Alexander Yakimenko Making ghost vortices visible in two-component Bose-Einstein condensates Physical Review Research |
| title | Making ghost vortices visible in two-component Bose-Einstein condensates |
| title_full | Making ghost vortices visible in two-component Bose-Einstein condensates |
| title_fullStr | Making ghost vortices visible in two-component Bose-Einstein condensates |
| title_full_unstemmed | Making ghost vortices visible in two-component Bose-Einstein condensates |
| title_short | Making ghost vortices visible in two-component Bose-Einstein condensates |
| title_sort | making ghost vortices visible in two component bose einstein condensates |
| url | http://doi.org/10.1103/PhysRevResearch.5.023109 |
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