Low-temperature crystallization conjecture for one-dimensional Riesz gases

Let Ps,β\mathsf{P}_{s,\beta} denote a one-dimensional non-singular Riesz gas with homogeneity parameter ss, and let LebR\mathsf{Leb}_{\mathbb{R}} be Lebesgue measure on R\mathbb{R}. For point processes or measures, write Wass1\mathsf{Wass}_1 for the Wasserstein-1 distance. Riesz-gas crystallization conjecture. For −1<s<0-1<s<0, there exists β0(s)>0\beta_0(s)>0, decreasing in ss, such that for β>β0(s)\beta>\beta_0(s) we have

Wass1(Ps,β,LebR)<+∞,\mathsf{Wass}_1(\mathsf{P}_{s,\beta},\mathsf{Leb}_{\mathbb{R}})<+\infty,

whereas for 0<β<β0(s)0<\beta<\beta_0(s) we have

Wass1(Ps,β,LebR)=+∞.\mathsf{Wass}_1(\mathsf{P}_{s,\beta},\mathsf{Leb}_{\mathbb{R}})=+\infty.

The conjecture predicts a temperature-driven transition between a crystalline low-temperature regime and a quasi-solid high-temperature regime for one-dimensional Riesz gases with −1<s<0-1<s<0. It would imply the three rigidity properties discussed in the paper, with the Cyclic-Factor property corresponding to crystallization; the phase transition has not yet been proved rigorously.

References

Primary source

David Dereudre and Rafaël Digneaux, “Rigidity of one-dimensional point processes via optimal transport”, arXiv:2510.17257 (2025).

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