|author(s)||Tilman Zibold, Eike Nicklas, Christian Gross, and Markus K. Oberthaler|
|title||Classical Bifurcation at the Transition from Rabi to Josephson Dynamics|
|Keywords||bifurcation, Bose-Einstein condensate, nonlinear dynamics|
|source||Physical Review Letters, arXiv:1008.3057|
We report on the experimental demonstration of the internal bosonic Josephson effect in a rubidium spinor Bose-Einstein condensate. The measurement of the full time dynamics in phase space allows the characterization of the theoretically predicted π-phase modes and quantitatively confirms analytical predictions, revealing a classical bifurcation. Our results suggest that this system is a model system which can be tuned from classical to the quantum regime and thus is an important step towards the experimental investigation of entanglement generation close to critical points.