A high-speed tunable beam splitter for feed-forward photonic quantum information processing

Autor(en)

Xiaosong Ma, Stefan Zotter, Nuray Tetik, Angie Qarry, Thomas Jennewein, Anton Zeilinger

Abstrakt

We realize quantum gates for path qubits with a high-speed, polarization-independent and tunable beam splitter. Two electro-optical modulators act in a Mach-Zehnder interferometer as high-speed phase shifters and rapidly tune its splitting ratio. We test its performance with heralded single photons, observing a polarization-independent interference contrast above 95%. The switching time is about 5.6 ns, and a maximal repetition rate is 2.5 MHz. We demonstrate tunable feed-forward operations of a single-qubit gate of path-encoded qubits and a two-qubit gate via measurement-induced interaction between two photons.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Optics Express

Band

19

Seiten

22723-22730

Anzahl der Seiten

8

DOI

https://doi.org/10.1364/OE.19.022723

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

103021 Optik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/9a7f6595-ad79-4a07-9613-7a7660532119