Scalable fiber integrated source for higher-dimensional path-entangled photonic quNits

Autor(en)

Christoph Schäff, Robert Polster, Radek Lapkiewicz, Robert Fickler, Sven Ramelow, Anton Zeilinger

Abstrakt

Integrated photonic circuits offer the possibility for complex quantum optical experiments in higher-dimensional photonic systems. However, the advantages of integration and scalability can only be fully utilized with the availability of a source for higher-dimensional entangled photons. Here, a novel fiber integrated source for path-entangled photons in the telecom band at 1.55µm using only standard fiber technology is presented. Due to the special design the source shows good scalability towards higher-dimensional entangled photonic states (quNits), while path entanglement offers direct compatibility with on-chip path encoding. We present an experimental realization of a path-entangled two-qubit source. A very high quality of entanglement is verified by various measurements, i.a. a tomographic state reconstruction is performed leading to a background corrected fidelity of (99.45±0.06)%. Moreover, we describe an easy method for extending our source to arbitrarily high dimensions.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Journal

Optics Express

Band

20

Seiten

16145-16153

Anzahl der Seiten

9

DOI

https://doi.org/10.1364/OE.20.016145

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/035bba8f-d921-4ec3-a7c3-01399c09669d