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Partial polarization by quantum distinguishability

Autor(en)
Mayukh Lahiri, Armin Hochrainer, Radek Lapkiewicz, Gabriela Barreto Lemos, Anton Zeilinger
Abstrakt

We establish that a connection exists between wave-particle duality of photons and partial polarization of a light beam. We perform a two-path lowest-order (single photon) interference experiment and demonstrate both theoretically and experimentally that the degree of polarization of the light beam emerging from an output of the interferometer depends on path distinguishability. In our experiment, we are able to change the quantum state of the emerging photon from a pure state to a fully mixed state without any direct interaction with the photon. Although most lowest-order interference experiments can be explained by classical theory, our experiment has no genuine classical analog. Our results show that a case exists where the cause of partial polarization is beyond the scope of classical theory.

Organisation(en)
Quantenoptik, Quantennanophysik und Quanteninformation
Externe Organisation(en)
Österreichische Akademie der Wissenschaften (ÖAW)
Journal
Physical Review A
Band
95
Anzahl der Seiten
6
ISSN
1050-2947
DOI
https://doi.org/10.1103/PhysRevA.95.033816
Publikationsdatum
03-2017
Peer-reviewed
Ja
ÖFOS 2012
103025 Quantenmechanik, 103021 Optik
Schlagwörter
ASJC Scopus Sachgebiete
Atomic and Molecular Physics, and Optics
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/12f92a49-8f64-4938-80fd-68c86f4aee4a