Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Poster: Quantum Optics and Photonics III
Q 58.13: Poster
Donnerstag, 14. März 2019, 16:15–18:15, S Atrium Informatik
How accurately can we measure the Photon-Exchange Phase? — Konrad Tschernig2, •Malte Smoor1, Tim Kroh1, Chris Müller1, Armando Perez-Leija2, Kurt Busch1, 2, and Oliver Benson1 — 1Humboldt-Universität zu Berlin Institut für Physik, 12489 Berlin, Germany — 2Max-Born-Institut, 12489 Berlin, Germany
The bosonic nature of photons is an essential result of quantum electrodynamics. So far it has been only measured indirectly, e.g. through experiments using the photon bunching effect (a.k.a. Hong-Ou-Mandel effect) [1]. At the most fundamental level, the statistical properties of fermions and bosons differ in the exchange phase φ. When two identical particles are exchanged, the wave function acquires an additional factor exp(iφ) with a value of φ = 0 for bosons and φ = π for fermions. A third possibility would be the exotic Anyon, for which the exchange phase φ takes a value different from 0 or π. Recently, protocols for measuring the exchange phase using massive particles, have been proposed [2].
Here, we present a theoretical-experimental framework to directly measure the exchange phase of photons (massless particles). Our experimental setup consists of two coupled Mach-Zehnder interferometers fed by indistinguishable photon pairs generated in a bright source based on cavity-enhanced parametric downconversion [3].
[1] C. K. Hong et al., Physical Review Letters 59, 2044, 1987
[2] C. F. Roos et al., Physical Review Letters 119, 160401, 2017
[3] A. Ahlrichs et al., Applied Physics Letter 108, 021111, 2016