Two-point phase correlations of a one-dimensional bosonic Josephson junction

Details Two-point phase correlations of a one-dimensional bosonic Josephson junction Two-point phase correlations of a one-dimensional bosonic Josephson junction

2010-10-28

arxiv.org/abs/1010.5989v2

Phys. Rev. Lett. 106, 020407 (2011)

Physics

Condensed Matter

Quantum Gases

Scientific paper

10.1103/PhysRevLett.106.020407

We realize a one-dimensional Josephson junction using quantum degenerate Bose gases in a tunable double well potential on an atom chip. Matter wave interferometry gives direct access to the relative phase field, which reflects the interplay of thermally driven fluctuations and phase locking due to tunneling. The thermal equilibrium state is characterized by probing the full statistical distribution function of the two-point phase correlation. Comparison to a stochastic model allows to measure the coupling strength and temperature and hence a full characterization of the system.

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