Continuous-variable entanglement distillation of non-Gaussian mixed states

Dong R, Lassen M, Heersink J, Marquardt C, Filip R, Leuchs G, Andersen UL (2010)

Publication Type: Journal article

Publication year: 2010

Journal

Physical Review A - Atomic, Molecular, and Optical Physics American Physical Society

Book Volume: 82

Article Number: 012312

Journal Issue: 1

DOI: 10.1103/PhysRevA.82.012312

Abstract

Many different quantum-information communication protocols such as teleportation, dense coding, and entanglement-based quantum key distribution are based on the faithful transmission of entanglement between distant location in an optical network. The distribution of entanglement in such a network is, however, hampered by loss and noise that is inherent in all practical quantum channels. Thus, to enable faithful transmission one must resort to the protocol of entanglement distillation. In this paper we present a detailed theoretical analysis and an experimental realization of continuous variable entanglement distillation in a channel that is inflicted by different kinds of non-Gaussian noise. The continuous variable entangled states are generated by exploiting the third order nonlinearity in optical fibers, and the states are sent through a free-space laboratory channel in which the losses are altered to simulate a free-space atmospheric channel with varying losses. We use linear optical components, homodyne measurements, and classical communication to distill the entanglement, and we find that by using this method the entanglement can be probabilistically increased for some specific non-Gaussian noise channels. © 2010 The American Physical Society.

Authors with CRIS profile

Christoph Marquardt Lehrstuhl für Experimentalphysik (Optik) Gerhard Leuchs Lehrstuhl für Experimentalphysik (Optik)

Involved external institutions

Technical University of Denmark / Danmarks Tekniske Universitet (DTU) DK Denmark (DK) Palacky University Olomouc / Univerzita Palackého v Olomouci CZ Czech Republic (CZ) Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Dong, R., Lassen, M., Heersink, J., Marquardt, C., Filip, R., Leuchs, G., & Andersen, U.L. (2010). Continuous-variable entanglement distillation of non-Gaussian mixed states. Physical Review A - Atomic, Molecular, and Optical Physics, 82(1). https://doi.org/10.1103/PhysRevA.82.012312

MLA:

Dong, Ruifang, et al. "Continuous-variable entanglement distillation of non-Gaussian mixed states." Physical Review A - Atomic, Molecular, and Optical Physics 82.1 (2010).

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