Adaptive versus nonadaptive strategies for quantum channel discrimination
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TLDR
A pair of entanglement-breaking channels are given that can be perfectly discriminated by means of an adaptive strategy that requires just two channel evaluations, but for which no nonadaptive strategy can give a perfect discrimination using any finite number of channel evaluations.Abstract:
We provide a simple example that illustrates the advantage of adaptive over nonadaptive strategies for quantum channel discrimination. In particular, we give a pair of entanglement-breaking channels that can be perfectly discriminated by means of an adaptive strategy that requires just two channel evaluations, but for which no nonadaptive strategy can give a perfect discrimination using any finite number of channel evaluations.read more
Citations
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Journal ArticleDOI
Gaussian quantum information
Christian Weedbrook,Stefano Pirandola,Raúl García-Patrón,Nicolas J. Cerf,Timothy C. Ralph,Jeffrey H. Shapiro,Seth Lloyd +6 more
TL;DR: This review focuses on continuous-variable quantum information processes that rely on any combination of Gaussian states, Gaussian operations, and Gaussian measurements, including quantum communication, quantum cryptography, quantum computation, quantum teleportation, and quantum state and channel discrimination.
Journal ArticleDOI
Advances in photonic quantum sensing
Stefano Pirandola,Stefano Pirandola,Bhaskar Roy Bardhan,Tobias Gehring,Christian Weedbrook,Seth Lloyd +5 more
TL;DR: The theoretical and experimental developments of quantum reading of classical data, quantum illumination of targets, and optical resolution beyond the Rayleigh limit are described.
Journal ArticleDOI
Advances in Photonic Quantum Sensing
Stefano Pirandola,Stefano Pirandola,Bhaskar Roy Bardhan,Tobias Gehring,Christian Weedbrook,Seth Lloyd +5 more
TL;DR: In this paper, the basic tools behind quantum sensing are discussed, and the most recent and general formulations for the problems of quantum parameter estimation and hypothesis testing are discussed for the photonic regime.
Journal ArticleDOI
Strong Converse Exponents for a Quantum Channel Discrimination Problem and Quantum-Feedback-Assisted Communication
TL;DR: It is shown that the most general adaptive discrimination strategies provide no asymptotic advantage over non-adaptive tensor-power strategies in this channel discrimination setting, and a strong converse theorem is established for the quantum-feedback-assisted capacity of a channel.
Journal ArticleDOI
Fundamental limits to quantum channel discrimination
TL;DR: In this article, the authors investigated the symmetric discrimination of two arbitrary qudit channels by means of the most general protocols based on adaptive (feedback-assisted) quantum operations.
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