Exact quantum dynamics of a bosonic Josephson junction

Details Exact quantum dynamics of a bosonic Josephson junction Exact quantum dynamics of a bosonic Josephson junction

2009-05-06

arxiv.org/abs/0905.0902v1

Phys. Rev. Lett. 103, 220601 (2009)

Physics

Condensed Matter

Quantum Gases

11 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.103.220601

The quantum dynamics of a one-dimensional bosonic Josephson junction is studied by solving the time-dependent many-boson Schr\"odinger equation numerically exactly. Already for weak interparticle interactions and on short time scales, the commonly-employed mean-field and many-body methods are found to deviate substantially from the exact dynamics. The system exhibits rich many-body dynamics like enhanced tunneling and a novel equilibration phenomenon of the junction depending on the interaction, attributed to a quick loss of coherence.

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