Optimization of Quantum Information Processing Maximizing Mutual Information

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dc.creatorBelavkin, V. P.
dc.creatorStratonovich, R. L.
dc.date2005-11-04
dc.date.accessioned2026-07-07T06:52:39Z
dc.date.available2026-07-07T06:52:39Z
dc.descriptionA model of quantum noisy channel with input encoding by a classical random vector is described. An equation of optimality is derived to determine a complete set of wave functions describing quantum decodings based on quasi-measurements maximizing the classical amount of transmitted information. A solution of this equation is found for the Gaussian multimode case with input Gaussian distribution. It is described by the overcomplete family of coherent vectors describing an optimal quasimeasurement of the canonical annihilation amplitudes in the output Hilbert space. It is found that the optimal decoding in this case realizes the maximum amount I=Spln[1+S/(N+1)] of the classical information as transmitted via the classical Gaussian channel with the effective noise covariance matrix N+I. A physical realization of optimal quasi-measurement based on an indirect (heterodyne) observation of the canonical operators is suggested.
dc.description9 pages. Quantum Information more than 30 years ago. See more at http://www.maths.nott.ac.uk/personal/vpb/vpb_research.html
dc.identifierhttps://arxiv.org/abs/quant-ph/0511042
dc.identifierhttp://arxiv.org/abs/quant-ph/0511042
dc.identifierRadio Eng. Electron. Phys., 19 (9), p. 1349, 1973. [trans. from Radiotekhnika i Electronika, 1973, 19, 9, 1839. 844]
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/105369
dc.subjectQuantum Physics
dc.titleOptimization of Quantum Information Processing Maximizing Mutual Information
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