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Article Dans Une Revue npj Quantum Information Année : 2022

Distribution and quantification of remotely generated Wigner negativity

Yu Xiang
Shuheng Liu
  • Fonction : Auteur
Jiajie Guo
  • Fonction : Auteur
Qihuang Gong
  • Fonction : Auteur
Qiongyi He
Mattia Walschaers

Résumé

Wigner negativity, as a well-known indicator of nonclassicality, plays an essential role in quantum computing and simulation using continuous-variable systems. The conditional preparation of Wigner-negative states through appropriate non-Gaussian operations on an auxiliary mode is common procedure in quantum optics experiments. Motivated by the demand of real-world quantum network, here we investigate the remote creation and distribution of Wigner negativity in the multipartite scenario from a quantitative perspective. By establishing a monogamy relation akin to the generalized Coffman-Kundu-Wootters inequality, we show that the amount of Wigner negativity cannot be freely distributed among different modes. Moreover, for photon subtraction-one of the main experimentally realized non-Gaussian operations-we provide an intuitive method to quantify remotely generated Wigner negativity. Our results pave the way for exploiting Wigner negativity as a valuable resource for numerous quantum information protocols based on non-Gaussian scenario.
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Dates et versions

hal-03806270 , version 1 (07-10-2022)

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Yu Xiang, Shuheng Liu, Jiajie Guo, Qihuang Gong, Nicolas Treps, et al.. Distribution and quantification of remotely generated Wigner negativity. npj Quantum Information, 2022, 8 (1), pp.21. ⟨10.1038/s41534-022-00533-3⟩. ⟨hal-03806270⟩
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