2013

Ultimate communication capacity of quantum optical channels by solving the Gaussian minimum-entropy conjecture

Giovannetti, V., Garcia-Patron, R., Cerf, N. J. et al.

Understand

Optical channels, such as fibers or free-space links, are ubiquitous in today's telecommunication networks.

They rely on the electromagnetic field associated with photons to carry information from one point to another in space.
As a result, a complete physical model of these channels must necessarily take quantum effects into account in order to determine their ultimate performances.
Specifically, Gaussian photonic (or bosonic) quantum channels have been extensively studied over the past decades given their importance for practical purposes.

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Similar

V. Giovannetti and S. Lloyd, Additivity properties of a Gaussian channel, Phys. Rev. A 69
2004
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2004
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V. Giovannetti, S. Guha, S. Lloyd, L. Maccone, J. H. Shapiro, and H. P. Yuen, Classical capacity of the lossy bosonic channel: the exact solution, Phys. Rev. Lett. 92
2004
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Then

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R. König and G. Smith, Limits on classical communication from quantum entropy power inequalities, Nature Photon. 7
2013
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2013
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J. Schäfer, E. Karpov, R. García-Patrón, O. V. Pilyavets, and N. J. Cerf, Equivalence Relations for the Classical Capacity of Single-Mode Gaussian Quantum Channels, Phys. Rev. Lett. 111
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V. Giovannetti, A. S. Holevo, and R. R. García-Patrón, A solution of the Gaussian optimizer conjecture, arXiv:1312.2251 [quant-ph] (2013)
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