2019/12/31 by Mattia Walschaers, Nicolas Treps
Computer Science · Mathematics · Physics and Astronomy · Psychology · #Arithmetic #Computer science #Einstein #Mathematics #Mode (computer interface) #Negativity effect #Photon #Physics #Psychology #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #Statistical physics #Subtraction #Wigner distribution function #physics.optics #quant-ph
paper · pdf · doi:10.1103/physrevlett.124.150501
published as Phys. Rev. Lett. 124, 150501 (2020) · 5 pages and 2 figures
openalex publication_date 2020/04/15 · arxiv created 2020/04/16 · arxiv updated 2020/04/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Negativity of the Wigner function is seen as a crucial resource for reaching a quantum computational advantage with continuous variable systems. However, these systems, while they allow for the deterministic generation of large entangled states, require an extra element such as photon subtraction to obtain such negativity. Photon subtraction is known to affect modes beyond the one where the photon is subtracted, an effect which is governed by the correlations of the state. In this Letter, we build upon this effect to remotely prepare states with Wigner negativity. More specifically, we show that photon subtraction can induce Wigner negativity in a correlated mode if and only if that correlated mode can perform Einstein-Podolsky-Rosen steering in the mode of subtraction.