Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 70: Ultracold Atoms II (joint session Q/A)
Q 70.7: Talk
Friday, March 9, 2018, 12:00–12:15, K 1.022
Signatures of indistinguishability in bosonic many-body dynamics — •Tobias Brünner1, Gabriel Dufour1,2, Alberto Rodriguez1, and Andreas Buchleitner1 — 1Physikalisches Institut, Albert-Ludwigs-Universität-Freiburg, Hermann-Herder-Straße 3, D-79104, Freiburg, Germany — 2Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität-Freiburg, Albertstraße 19, D-79104 Freiburg, Germany
Many-body interference occurs as a fundamental process during the evolution of a quantum system consisting of two or more indistinguishable particles. The (measurable) consequences of this interference, as a function of the particles' mutual indistinguishability, was studied for non-interacting photons transmitted through beam-splitter arrays. However, the role of many-body interference in the dynamics of interacting particles, e.g. cold atoms in optical lattices, had so far remained unclear. We identify a quantifier of the particles' mutual indistinguishability attuned to time-continuously evolving systems of (interacting) particles, which predicts the dynamical behaviour of observables influenced by genuine few-body interference. Our measure allows a systematic exploration of the role of many-body interference in the non-, weakly, and strongly interacting regimes.