Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction

Details Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction

2004-11-30

arxiv.org/abs/cond-mat/0411757v4

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevLett.95.010402

We report on the first realization of a single bosonic Josephson junction, implemented by two weakly linked Bose-Einstein condensates in a double-well potential. In order to fully investigate the nonlinear tunneling dynamics we measure the density distribution in situ and deduce the relative phase between the two condensates from interference fringes. Our results verify the predicted nonlinear generalization of tunneling oscillations in superconducting and superfluid Josephson junctions. Additionally we confirm a novel nonlinear effect known as macroscopic quantum self-trapping, which leads to the inhibition of large amplitude tunneling oscillations.

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