Along the Wasserstein geodesic between κi-strongly log-concave measures, the Poincaré constant of μt satisfies √CP(μt) ≤ (1−t)/√κ0 + t/√κ1, with equality iff both endpoints share a curvature-saturating Gaussian factor.
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Sharp Poincar\'e Interpolation Along Wasserstein Geodesics
Along the Wasserstein geodesic between κi-strongly log-concave measures, the Poincaré constant of μt satisfies √CP(μt) ≤ (1−t)/√κ0 + t/√κ1, with equality iff both endpoints share a curvature-saturating Gaussian factor.