Coherent cross talk and parametric driving of matter-wave vortices
- Lookup NU author(s)
- Dr Nicholas Parker
- Dr Joy Allen
- Professor Carlo Barenghi
- Dr Nikolaos Proukakis
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| Author(s) | | Parker NG, Allen AJ, Barenghi CF, Proukakis NP |
| Publication type | | Article |
| Journal | | Physical Review A |
| Year | | 2012 |
| Volume | | 86 |
| Issue | | 1 |
| Pages | | |
| ISSN (print) | | 1050-2947 |
| ISSN (electronic) | | 1094-1622 |
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| Full text is available for this publication: |
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| We show that the interaction between vortices and sound waves in atomic Bose-Einstein condensates can be elucidated in a double-well trap: With one vortex in each well, the sound emitted by each precessing vortex can be driven into the opposing vortex (if of the same polarity). This cross talk leads to a periodic exchange of energy between the vortices which is long range and highly efficient. The increase in vortex energy (obtained by simulations of the Gross-Pitaevskii equation) is experimentally observable as a migration of the vortex to higher density over just a few precession periods. Similar effects can be controllably engineered by introducing a precessing localized obstacle into one well as an artificial generator of sound, thereby demonstrating the parametric driving of energy into a vortex. |
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| Publisher | | American Physical Society |
| URL | | http://dx.doi.org/10.1103/PhysRevA.86.013631 |
| DOI | | 10.1103/PhysRevA.86.013631 |
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