Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 12: Quantum Effects

Q 12.2: Talk

Monday, March 9, 2020, 14:15–14:30, f442

Partial distinguishability in systems of identical particles — •Gabriel Dufour, Eric Brunner, Christoph Dittel, and Andreas Buchleitner — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg

A complete description of bosonic and fermionic many-body systems should include degrees of freedom which could, in principle, allow to distinguish the particles. Indeed, the existence of such "labels" leads to the degradation of many-particle interference in the dynamical degrees of freedom. We show how partial distinguishability can be described in terms of entanglement between dynamical and label degrees of freedom and relate the coherences of the reduced state of the dynamical degrees of freedom with the interference contributions to expectation values of many-body observables.