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Gaussian quantum channels

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arxiv quant-ph/0505151 v1 pith:Q252CO7P submitted 2005-05-20 quant-ph

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keywords gaussianquantumadditivitycapacitieschannelsextendedresultssome
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This article provides an elementary introduction to Gaussian channels and their capacities. We review results on the classical, quantum, and entanglement assisted capacities and discuss related entropic quantities as well as additivity issues. Some of the known results are extended. In particular, it is shown that the quantum conditional entropy is maximized by Gaussian states and that some implications for additivity problems can be extended to the Gaussian setting.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. No-Go Theorem for Gaussian Quantum Repeaters from Fractional Extendibility

    quant-ph 2026-06 unverdicted novelty 8.0 of 10

    Gaussian repeater chains using only Gaussian operations, homodyne measurements, and classical communication achieve no higher quantum capacity than direct transmission over pure-loss channels.

  2. Gaussian Open Quantum Dynamics and Isomorphism to Superconformal Symmetry

    quant-ph 2025-07 conditional novelty 7.0 of 10

    The Gaussian-preserving superoperator algebra for n bosonic modes is R^{2n^2+3n} semidirect gl(2n,R), giving an exact Wigner-function solution of quadratic Redfield dynamics and an isomorphism to the 3D N=1 superconfo...

  3. An open harmonic chain: Exact vs global and local reduced dynamics

    quant-ph 2025-05 conditional novelty 5.0 of 10

    For a three-oscillator chain with two unequal-temperature baths, the local GKSL master equation is numerically closer to the exact dynamics for weak inter-oscillator coupling, while the global equation wins above a te...

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