Programmable linear quantum networks with a multimode fibre

Autor(en)

Saroch Leedumrongwatthanakun, Luca Innocenti , Hugo Defienne, Thomas Juffmann, A. Ferraro, Mauro Paternostro, Sylvain Gigan

Abstrakt

Reconfigurable quantum circuits are fundamental building blocks for the implementation of scalable quantum technologies. Their implementation has been pursued in linear optics through the engineering of sophisticated interferometers1,2,3. Although such optical networks have been successful in demonstrating the control of small-scale quantum circuits, scaling up to larger dimensions poses significant challenges4,5. Here, we demonstrate a potentially scalable route towards reconfigurable optical networks based on the use of a multimode fibre and advanced wavefront shaping techniques. We program networks involving spatial and polarization modes of the fibre and experimentally validate the accuracy and robustness of our approach using two-photon quantum states. In particular, we illustrate the reconfigurability of our platform by emulating a tunable coherent absorption experiment6. By demonstrating reliable reprogrammable linear transformations, with the prospect to scale, our results highlight the potential of complex media driven by wavefront shaping for quantum information processing.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation, Department für Strukturbiologie und Computational Biology

Externe Organisation(en)

Université Paris IV - Paris-Sorbonne, Collège de France, Queen's University Belfast, Max F. Perutz Laboratories GmbH (MFPL), University of Glasgow

Journal

Nature Photonics

Band

14

Seiten

139–142

Anzahl der Seiten

4

ISSN

1749-4885

DOI

https://doi.org/10.1038/s41566-019-0553-9

Publikationsdatum

12-2019

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik, 103021 Optik

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/752a9d7b-2447-4466-b454-3a73f1d9be38