Brownian motion correlation in the peanosphere for κ >8

Ewain Gwynne, Nina Holden, Jason Miller, Xin Sun

Research output: Contribution to journalArticlepeer-review


The peanosphere (or "mating of trees") construction of Duplantier, Miller, and Sheffield encodes certain types of γ - Liouville quantum gravity (LQG) surfaces (γ ∈ (0, 2)) decorated with an independent SLEκ (κ = 16/γ 2 > 4) in terms of a correlated two-dimensional Brownian motion and provides a framework for showing that random planar maps decorated with statistical physics models converge to LQG decorated with an SLE. Previously, the correlation for the Brownian motion was only explicitly identified as -cos(4π/κ) for κ ∈ (4, 8] and unknown for κ > 8. The main result of this work is that this formula holds for all κ > 4. This supplies the missing ingredient for proving convergence results of the aforementioned type for κ > 8. Our proof is based on the calculation of a certain tail exponent for SLEκ on a quantum wedge and then matching it with an exponent which is well-known for Brownian motion.

Original languageEnglish (US)
Pages (from-to)1866-1889
Number of pages24
JournalAnnales de l'institut Henri Poincare (B) Probability and Statistics
Issue number4
StatePublished - Nov 2017


  • Liouville quantum gravity
  • Peanosphere
  • Schramm-Loewner evolution

ASJC Scopus subject areas

  • Statistics and Probability
  • Statistics, Probability and Uncertainty


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