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Hamiltonians on Phase-Space Noncommutative Laws that are Uniformly Continuous in the Momentum at Bounded Positions

A Hamiltonian is uniformly continuous in the momentum at bounded positions if, for positions whose law has a given norm bound and momenta in a given L2 ball, small L2 changes of the momentum change its value uniformly little.

Statement

In the setting of Plan Jets and Hamiltonians on Square-Integrable Noncommutative Laws: Standing Notation, let H:Σ2d2→R\mathcal{H}:\Sigma^{2}_{2d}\to\mathbb{R}, with lifts HM\mathcal{H}_{M} as in Plan Jets and Hamiltonians on Square-Integrable Noncommutative Laws: Standing Notation §lifts; differences and the L2L^{2} norm ∥⋅∥2\lVert\cdot\rVert_{2} of L2L^{2} dd-tuples are those of Tracial W*-Probability Spaces and Square-Integrable Tuples: Standing Notation §tuples, laws law(X)\mathrm{law}(X) of L2L^{2} dd-tuples are those of Tracial W*-Probability Spaces and Square-Integrable Tuples: Standing Notation §tuples, and κd(Σd,R)\kappa_{d}(\Sigma_{d,R}) is the image of the set Σd,R\Sigma_{d,R} of Noncommutative Laws, Couplings and the Wasserstein Distance: Standing Notation §laws under the canonical map κd\kappa_{d} of Square-Integrable Noncommutative Laws: Standing Notation §laws.

H\mathcal{H} is uniformly continuous in the momentum at bounded positions if for all reals R>0R>0 and η>0\eta>0 there is a real r>0r>0 such that, for every tracial W*-probability space (H,M,Ω)(H,M,\Omega), every L2L^{2} dd-tuple XX of (H,M,Ω)(H,M,\Omega) with law(X)∈κd(Σd,R)\mathrm{law}(X)\in\kappa_{d}(\Sigma_{d,R}), and all L2L^{2} dd-tuples P,P′P,P' of (H,M,Ω)(H,M,\Omega) with ∥P∥2≤R\lVert P\rVert_{2}\le R, ∥P′∥2≤R\lVert P'\rVert_{2}\le R and ∥P−P′∥2<r\lVert P-P'\rVert_{2}<r,

∣HM(X,P)−HM(X,P′)∣<η.\bigl|\mathcal{H}_{M}(X,P)-\mathcal{H}_{M}(X,P')\bigr|<\eta.

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