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[Submitted on 14 Apr 2026 (v1), last revised 6 Jul 2026 (this ve · 2026-04-14 · via math.PR updates on arXiv.org

Mathematics > Operator Algebras

arXiv:2604.12212 (math)

[Submitted on 14 Apr 2026 (v1), last revised 6 Jul 2026 (this version, v2)]

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Abstract:We study entropy and optimal transport theory in the free probabilistic setting motivated by the large-$n$ theory of random tuples of matrices. We define a new version of free entropy $\chi_{\operatorname{chron}}^{\mathcal{U}}$, which is concave along geodesics in the corresponding Wasserstein space. Moreover, the heat evolution satisfies the evolution variational inequality, which means that the heat evolution is the Wasserstein gradient flow for entropy in the metric sense. It also has further desirable properties such as a chain rule for iterated conditioning, and an expression in terms of stochastic control problems. This entropy is defined using microstate spaces of matrix approximations with respect to an expanded class of test functions called chronological formulas, which are constructed so as to be closed under taking partial suprema and infima and application of a free heat semigroup. These formulas are part of a novel framework for studying noncommutative filtrations and stochastic processes as metric structures in the sense of continuous model theory.
Comments: 94 pages; minor corrections and additions in v2
Subjects: Operator Algebras (math.OA); Functional Analysis (math.FA); Logic (math.LO); Optimization and Control (math.OC); Probability (math.PR)
MSC classes: Primary: 46L54, 03C66, 49Q22, Secondary: 49J40, 60B20, 60F10, 60G10
Cite as: arXiv:2604.12212 [math.OA]
  (or arXiv:2604.12212v2 [math.OA] for this version)
  https://doi.org/10.48550/arXiv.2604.12212

arXiv-issued DOI via DataCite

Submission history

From: David Jekel [view email]
[v1] Tue, 14 Apr 2026 02:40:20 UTC (93 KB)
[v2] Mon, 6 Jul 2026 17:06:09 UTC (95 KB)

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