Characterization of a π-phase shift quantum gate for coherent-state qubits

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Author(s)
Blandino, Rémi
Ferreyrol, Franck
Barbieri, Marco
Grangier, Philippe
Tualle-Brouri, Rosa
Griffith University Author(s)
Year published
2012
Metadata
Show full item recordAbstract
We discuss the characterization of a p-phase shift quantum gate acting on a qubit encoded in superpositions of coherent states. We adopt a technique relying on some a priori knowledge about the physics underlying the functioning of the device. A parameter summarizing the global quality of the quantum gate is obtained by 'virtually' processing an entangled state. With such an approach, we can facilitate the characterization of our gate, focusing on the useful subspace rather than on the entire phase space.We discuss the characterization of a p-phase shift quantum gate acting on a qubit encoded in superpositions of coherent states. We adopt a technique relying on some a priori knowledge about the physics underlying the functioning of the device. A parameter summarizing the global quality of the quantum gate is obtained by 'virtually' processing an entangled state. With such an approach, we can facilitate the characterization of our gate, focusing on the useful subspace rather than on the entire phase space.
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Journal Title
New Journal of Physics
Volume
14
Copyright Statement
© 2012 Institute of Physics Publishing. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Note
Page numbers are not for citation purposes. Instead, this article has the unique article number of 013017.
Subject
Quantum Information, Computation and Communication
Quantum Optics
Physical Sciences