Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 13: Posters: Quantum Optics and Photonics I

Q 13.14: Poster

Monday, March 9, 2020, 16:30–18:30, Empore Lichthof

Partial Distinguishability and Coherence in Many-Body Systems — •Eric Brunner, Christoph Dittel, Gabriel Dufour, and Andreas Buchleitner — Quantenoptik und -statistik, Physikalisches Institut, Albert-Ludwigs-Universität Freiburg

Many-body interference in the dynamics of identical particles is controlled by their mutual indistinguishability. This can be tuned by addressing suitable ``label'' degrees of freedom. Through a systematic analysis of coherence in the dynamical modes, limited by entanglement between dynamical and label degrees of freedom, we define a hierarchy of indistinguishability measures. Identifying robust signatures of many-body interference in randomized correlation measurements allows us to uncover the coherence structure of a given input state, and, therefore, to assess the degree of indistinguishability. This paves the way for an experimental quantification of partial distinguishability in general non-interacting many-body systems.