Gregor Weihs

Symmetry Allows for Distinguishability in Totally Destructive Many-Particle Interference

2021 · PRX Quantum

We investigate, in a four-photon interference experiment in a laser-written waveguide structure, how symmetries control the suppression of many-body output events of a J x unitary. We show that totally destructive interference does not require …

A Franson Interferometer for Broadband Frequency-Entangled Photon Pairs

2023

In a Franson interferometer two-photon interference fringes occur despite the photons never encountering each other [1]. This phenomenon is a fundamental demonstration of the nonlocal nature of quantum mechanics. It serves also as a direct …