A dipolar self-induced bosonic Josephson junction

作者：Abad M^*; Guilleumas M; Mayol R; Pi M; Jezek D M

来源：EPL, 2011, 94(1): 10004.

DOI：10.1209/0295-5075/94/10004

We propose a new scheme for observing Josephson oscillations and macroscopic quantum self-trapping in a toroidally confined Bose-Einstein condensate: a dipolar self-induced Josephson junction. Polarizing the atoms perpendicularly to the trap symmetry axis, an effective ring-shaped, double-well potential is achieved which is induced by the dipolar interaction. By numerically solving the three-dimensional time-dependent Gross-Pitaevskii equation we show that coherent tunneling phenomena such as Josephson oscillations and quantum self-trapping can take place. The dynamics in the self-induced junction can be qualitatively described by a two-mode model taking into account both s-wave and dipolar interactions.

• 出版日期2011-4