Erlangen 2022 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 66: Quantum Effects IV
Q 66.2: Vortrag
Freitag, 18. März 2022, 10:45–11:00, Q-H13
Many-body coherence and entanglement from randomized correlation measurements — •Eric Brunner1,2, Andreas Buchleitner1,2, and Gabriel Dufour1,2 — 1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Deutschland — 2EUCOR Centre for Quantum Science and Quantum Computing, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Deutschland
We show that k-point correlation measurements on output of a non-interacting, multimode random unitary allow to quantify the k-particle coherence of N ≥ k identical (bosonic or fermionic) particles. We establish a strictly monotonic relationship between k-particle coherence, the interference contrast in the experimentally accessible counting statistics, and the degree of the particles’ mutual distinguishability, as controlled by their internal degrees of freedom, given separable many-particle input states. Non-separability on input can be unveiled by comparison of correlation measurements of different orders.