= Albiez double-well Josephson experiment
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Two weakly coupled condensates in a double-well potential realize one <bosonic Josephson junction>. The 2005 experiment measured the density distribution in situ and inferred the evolving relative phase from <interference> fringes. It distinguished tunneling oscillations from nonlinear suppression of large-amplitude transfer, called macroscopic quantum self-trapping.<Direct Observation of Tunneling and Nonlinear Self-Trapping in a Single Bosonic Josephson Junction by Michael Albiez and others>[2005 abstract: apparatus and the two measurement channels]{ref}
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