**Authors**:
Alessandro Giuliani, Vieri Mastropietro, Fabio Toninelli

**Title:** *
Haldane realation for interacting dimers
*

**Sommario**:*
We consider a model of weakly interacting, close-packed, dimers on the two-dimensional square lattice. In a previous paper, we
computed both the multipoint dimer correlations, which display non-trivial critical exponents, continuously varying with the interaction strength;
and the height fluctuations, which, after proper coarse graining and rescaling, converge to the massless Gaussian field with a suitable
interaction-dependent pre-factor (`amplitude').
In this paper, we prove the identity between the critical exponent of the two-point dimer correlation and the amplitude of this massless Gaussian field.
This identity is the restatement, in the context of interacting dimers, of one of the
Haldane universality relations, part of his Luttinger liquid conjecture, originally formulated in the context of one-dimensional interacting Fermi systems.
Its validity is a strong confirmation of the effective
massless Gaussian field description of the interacting dimer model, which was guessed on the basis of formal bosonization arguments.
We also conjecture that a certain discrete curve defined at the lattice level
via the Temperley bijection converges in the scaling limit to an SLE _{κ}
process, with κ depending non-trivially on the interaction and related
in a simple way to the amplitude of the limiting Gaussian field.
*

Alessandro Giuliani

Dipartimento di Matematica e Fisica, Università degli Studi Roma Tre,
00146 Roma Italy

giuliani@mat.uniroma3.it

Vieri Mastropietro

Dipartimento di Matematica, Università degli Studi di Milano, 20133 Milano
Italy

vieri.mastropietro@unimi.it

Fabio Toninelli

CNRS and Université de Lyon, Université Lyon 1, Institut Camille Jordan,
69622 Villeurbanne France

toninelli@math.univ-lyon1.fr