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A dual formula for the noncommutative transport distance

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arxiv 2104.11923 v2 pith:BBZ62OUD submitted 2021-04-24 math-ph math.MPmath.OAmath.OC

A dual formula for the noncommutative transport distance

classification math-ph math.MPmath.OAmath.OC
keywords distancedualformulanoncommutativetransportarticlebeckerbenamou-brenier
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In this article we study the noncommutative transport distance introduced by Carlen and Maas and its entropic regularization defined by Becker and Li. We prove a duality formula that can be understood as a quantum version of the dual Benamou-Brenier formulation of the Wasserstein distance in terms of subsolutions of Hamilton-Jacobi-Bellmann equation.

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  1. Wigner symmetries single out symmetric Wasserstein distances in all finite dimensions

    math-ph 2026-07 accept novelty 6.5

    Within quadratic costs from ≤ d^{2}-1 observables, Wasserstein isometries are precisely the Wigner symmetries iff the cost is isotropic (a positive multiple of the identity on the traceless subspace).