Quantum dynamics in the bosonic Josephson junction

Details Quantum dynamics in the bosonic Josephson junction Quantum dynamics in the bosonic Josephson junction

2010-01-13

arxiv.org/abs/1001.2120v2

Phys. Rev. A 82, 053617 (2010)

Physics

Quantum Physics

18 pages, 8 figures, improved version, pedagogical orientation, 3 extra appendices that are not included in the published vers

Scientific paper

10.1103/PhysRevA.82.053617

We employ a semiclassical picture to study dynamics in a bosonic Josephson junction with various initial conditions. Phase-diffusion of coherent preparations in the Josephson regime is shown to depend on the initial relative phase between the two condensates. For initially incoherent condensates, we find a universal value for the buildup of coherence in the Josephson regime. In addition, we contrast two seemingly similar on-separatrix coherent preparations, finding striking differences in their convergence to classicality as the number of particles increases.

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