| Autor: |
Shumpei Masuda, Tetsuo Ohmi, Mikio Nakahara, Xi Chen, Utkan Güngördü |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Physical Review A. 93(1):1-8 |
| ISSN: |
1050-2947 |
| Popis: |
Fast creation of a single vortex in BEC of alkali-metal atoms at a prescribed position and time is still challenging, even though various methods to create single and multiple vortices have been proposed and demonstrated. Topological vortex formation is advantageous in this respect over other methods in that the position and time of vortex formation is highly controllable. This method requires inversion of the bias magnetic field along the axis of the condensate, which leads to unwanted atom loss due to nonadiabatic transitions when the bias field crosses zero. It is the purpose of this paper to propose a scheme that enables a fast creation of a vortex in much shorter time than needed for adiabatic control time by introducing the counterdiabatic field to avert the atom loss. We further introduce a gauge transformation so that the required magnetic field is generated by manipulating the current of the Ioffe bars, which makes our proposal experimentally feasible. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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