The Quantum Theory of Optical Communications

By Jeffrey H. Shapiro. IEEE Journal of Selected Topics in Quantum Electronics, 2009

135 citations recorded by the source corpus.

Communication theory applied to lightwave channels is ordinarily carried out using the semiclassical theory of photodetection. Recent development of nonclassical light sources-whose photodetection statistics require the use of quantum theory-plus increasing interest in optics-based approaches to quantum information processing necessitates a thorough understanding of the similarities and distinctions between the semiclassical and quantum theories of optical communications. This paper is addressed to that need, focusing, for convenience, on the free-space communication channel using Gaussian states of light. The quantum version of the Huygens-Fresnel diffraction integral is reviewed, along with the semiclassical and quantum theories of direct, homodyne, and heterodyne detection. Maximally entangled Gaussian state light is used, in conjunction with quantum photodetection theory, to explain the nonclassical effects seen in Hong-Ou-Mandel interferometry and violation of the Clauser-Horne-Shimony-Holt form of Bell's inequality. The classical information capacities of several bosonic channels are reviewed, and shown to exceed what can be achieved using conventional optical receivers.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/c3426f4dbd6dbf619037488e6a132b49c22412c7

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Citations in the corpus

Subdiffraction incoherent optical imaging via spatial-mode demultiplexing (2016, background): “) denotes a column vector, F (R) is the source intensity distribution with normalization ∫ d2RF (R) = 1, |r〉 = a†(r) |vac〉 is a one-photon position eigenket on the image plane at position r = (x, y) with [a(r), a†(r′)] = δ2(r− r′) [39], and ψ(r) is the field point-spread function (PSF) of the imagin”
Quantum theory of superresolution for two incoherent optical point sources (2015, methodology): “In the paraxial regime, we can use localized wave-packet modes as a basis [29,30].”
Quantum Machine Learning for 6G Communication Networks: State-of-the-Art and Vision for the Future (2019, background): “To address these issues, optical communication systems can be designed under the quantum-mechanical framework [131].”
Quantum channels and memory effects (2012, background): “…quantum electromagnetic field in linear dispersive media, including the free-space propagation and through linear optical systems, can be described by a quantum channel with memory (Giovannetti, et al., 2004b; Lupo, et al., 2011b; Shapiro, 2009), where wave diffraction introduces memory effects.”