Distribution and quantification of remotely generated Wigner negativity

Wigner negativity, as a well-known indicator of nonclassicality, plays an essential role in quantum computing and simulation using continuous-variable systems. Recently, it has been proven that Einstein-Podolsky-Rosen steering is prerequisite to generate negativity between two remote modes. Motivated by the demand real-world network, here we investigate shareability generated multipartite scenario from quantitative perspective. By establishing monogamy relation akin generalized Coffman-Kundu-Wootters inequality, show amount cannot be freely distributed among different Moreover, for photon subtraction -- one main experimentally realized non-Gaussian operations provide general method quantify remotely negativity. With this method, find there no direct Gaussian steerability Our results pave way exploiting valuable resource numerous information protocols based on scenario.