A robust quantum receiver for phase shift keyed signals

Mueller CR, Marquardt C (2015)

Publication Type: Journal article

Publication year: 2015

Journal

New Journal of Physics Institute of Physics: Open Access Journals / Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft

Book Volume: 17

Pages Range: 1-12

Article Number: 032003

DOI: 10.1088/1367-2630/17/3/032003

Abstract

The impossibility of perfectly discriminating non-orthogonal quantum states imposes far-reaching consequences both on quantum and classical communication schemes. We propose and numerically analyze an optimized quantum receiver for the discrimination of phase encoded signals. Our scheme outperforms the standard quantum limit and approaches the Helstrom bound for any signal power. The discrimination is performed via an optimized, feedback-mediated displacement prior to a photon counting detector. We provide a detailed analysis of the influence of excess noise and technical imperfections on the average error probability. The results demonstrate the receiver's robustness and show that it can outperform any classical receiver over a wide range of realistic parameters.

Authors with CRIS profile

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:

Mueller, C.R., & Marquardt, C. (2015). A robust quantum receiver for phase shift keyed signals. New Journal of Physics, 17, 1-12. https://doi.org/10.1088/1367-2630/17/3/032003

MLA:

Mueller, C. R., and Christoph Marquardt. "A robust quantum receiver for phase shift keyed signals." New Journal of Physics 17 (2015): 1-12.

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