Optimal linear optical implementation of a single-qubit damping channel

Autor(en)

Kent Fisher, Robert Prevedel, Rainer Kaltenbaek, Kevin J. Resch

Abstrakt

We experimentally demonstrate a single-qubit decohering quantum channel using linear optics. We implement the channel, whose special cases include the familiar amplitude-damping channel and the bit-flip channel, using a single, static optical setup. Following a recent theoretical result (Piani et al 2011 Phys. Rev. A 84 032304), we realize the channel in an optimal way, maximizing the probability of success, i.e. the probability for the photonic qubit to remain in its encoding. Using a two-photon entangled resource, we characterize the channel using ancilla-assisted process tomography and find average process fidelities of 0.98 ± 0.01 and 0.976 ± 0.009 for amplitude-damping and the bit-flip case, respectively.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

University of Waterloo (UW)

Journal

New Journal of Physics

Band

14

Anzahl der Seiten

8

ISSN

1367-2630

DOI

https://doi.org/10.1088/1367-2630/14/3/033016

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/095fd5c1-c38a-4f8c-8590-a99e2dab4194