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Gaussian quantum information

2011/10/14 by Christian Weedbrook, Stefano Pirandola, Raul Garcia-Patron +6 · 3,709 citations
Computer Science · Physics and Astronomy · #Open quantum system #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum algorithm #Quantum capacity #Quantum channel #Quantum computer #Quantum cryptography #Quantum entanglement #Quantum error correction #Quantum information #Quantum information science #Quantum mechanics #Quantum network #Quantum technology #Quantum teleportation #Qubit #Statistical physics #quant-ph

paper · pdf · doi:10.1103/revmodphys.84.621

published in Reviews of Modern Physics 84(2), 621-669 (American Physical Society) · 51 pages, 7 figures, submitted to Reviews of Modern Physics

arxiv created 2011/10/14 · openalex publication_date 2012/05/01 · arxiv updated 2012/05/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

The science of quantum information has arisen over the last two decades centered on the manipulation of individual quanta of information, known as quantum bits or qubits. Quantum computers, quantum cryptography, and quantum teleportation are among the most celebrated ideas that have emerged from this new field. It was realized later on that using continuous-variable quantum information carriers, instead of qubits, constitutes an extremely powerful alternative approach to quantum information processing. This review focuses on continuous-variable quantum information processes that rely on any combination of Gaussian states, Gaussian operations, and Gaussian measurements. Interestingly, such a restriction to the Gaussian realm comes with various benefits, since on the theoretical side, simple analytical tools are available and, on the experimental side, optical components effecting Gaussian processes are readily available in the laboratory. Yet, Gaussian quantum information processing opens the way to a wide variety of tasks and applications, including quantum communication, quantum cryptography, quantum computation, quantum teleportation, and quantum state and channel discrimination. This review reports on the state of the art in this field, ranging from the basic theoretical tools and landmark experimental realizations to the most recent successful developments.

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