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

Abstract

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.

References in corpus (17)

• Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction
• Matter-wave interferometry in a double well on an atom chip
• Non-equilibrium coherence dynamics in one-dimensional Bose gases
• Regimes of quantum degeneracy in trapped 1D gases
• Atom Chips
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• Quasi-1D Bose-Einstein condensates in the dimensional crossover regime
• Two-point density correlations of quasicondensates in free expansion
• Fluctuations and stochastic processes in one-dimensional many-body quantum systems
• Relative phase fluctuations of two coupled one-dimensional condensates
• Modulational instabilities in Josephson oscillations of elongated coupled condensates
• Breakdown of macroscopic quantum self-trapping in coupled mesoscopic one dimensional Bose gases

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