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- W3195275452 abstract "Following Ollivier's work, we introduce the coarse Ricci curvature of a quantum channel as the contraction of non-commutative metrics on the state space. These metrics are defined as a non-commutative transportation cost in the spirit of [N. Gozlan and C. Leonard. 2006], which gives a unified approach to different quantum Wasserstein distances in the literature. We prove that the coarse Ricci curvature lower bound and its dual gradient estimate, under suitable assumptions, imply the Poincare inequality (spectral gap) as well as transportation cost inequalities. Using intertwining relations, we obtain positive bounds on the coarse Ricci curvature of Gibbs samplers, Bosonic and Fermionic beam-splitters as well as Pauli channels on n-qubits." @default.
- W3195275452 created "2021-08-30" @default.
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- W3195275452 date "2021-08-24" @default.
- W3195275452 modified "2023-09-27" @default.
- W3195275452 title "Ricci curvature of quantum channels on non-commutative transportation metric spaces" @default.
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