Optimally cloned binary coherent states

Müller C, Leuchs G, Marquardt C, Andersen UL (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Physical Review A American Physical Society

Book Volume: 96

Article Number: 042311

Journal Issue: 4

DOI: 10.1103/PhysRevA.96.042311

Abstract

Binary coherent state alphabets can be represented in a two-dimensional Hilbert space. We capitalize this formal connection between the otherwise distinct domains of qubits and continuous variable states to map binary phase-shift keyed coherent states onto the Bloch sphere and to derive their quantum-optimal clones. We analyze the Wigner function and the cumulants of the clones, and we conclude that optimal cloning of binary coherent states requires a nonlinearity above second order. We propose several practical and near-optimal cloning schemes and compare their cloning fidelity to the optimal cloner.

Authors with CRIS profile

Christian Müller Lehrstuhl für Experimentalphysik (Optik) Gerhard Leuchs Lehrstuhl für Experimentalphysik (Optik) Christoph Marquardt Institut für Optik, Information und Photonik

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Müller, C., Leuchs, G., Marquardt, C., & Andersen, U.L. (2017). Optimally cloned binary coherent states. Physical Review A, 96(4). https://doi.org/10.1103/PhysRevA.96.042311

MLA:

Müller, Christian, et al. "Optimally cloned binary coherent states." Physical Review A 96.4 (2017).

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