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Fractional Moments of Small-Ball Masses for the Stochastic Heat Flow

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arxiv 2608.01141 v3 pith:WYW6W3XE submitted 2026-08-02 math.PR

classification math.PR
keywords blockflowfractionalheatmomentsstochasticallowsanalyzed
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We prove the logarithmic fractional-moment exponent for the mass of a shrinking ball under the critical two-dimensional stochastic heat flow. The proof builds on the geometric block decomposition of Gu and Tsai and introduces a fractional-product change of measure that preserves block independence and allows the fractional moments to be analyzed.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Logarithmic intermittency of the critical 2D SHF

    math.PR 2026-08 conditional novelty 8.0 of 10

    For the critical 2D stochastic heat flow, the minimal number of ε-balls carrying almost all mass is ε^{-2}(log 1/ε)^{-1/2+o(1)}, with the complementary sparsity bound holding simultaneously.

  2. Fractional moments of the Stochastic Heat Flow and 2D Directed Polymers

    math.PR 2026-08 conditional novelty 6.0 of 10

    For 0<p<1, the p-th moment of the critical 2D SHF mass on a small ball is bounded by the second moment raised to a negative power whenever the second moment diverges, uniformly in time, disorder, and radius.

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