Pair correlation for quadratic polynomials mod 1

Jens Marklof, Nadav Yesha

Research output: Contribution to journalArticlepeer-review


It is an open question whether the fractional parts of non-linear polynomials at integers have the same fine-scale statistics as a Poisson point process. Most results towards an affirmative answer have so far been restricted to almost sure convergence in the space of polynomials of a given degree. We will here provide explicit Diophantine conditions on the coefficients of polynomials of degree two, under which the convergence of an averaged pair correlation density can be established. The limit is consistent with the Poisson distribution. Since quadratic polynomials at integers represent the energy levels of a class of integrable quantum systems, our findings provide further evidence for the Berry-Tabor conjecture in the theory of quantum chaos.

Original languageEnglish
Pages (from-to)960-983
Number of pages24
JournalCompositio Mathematica
Issue number5
StatePublished - 1 May 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© The Authors 2018.


  • Berry-Tabor conjecture
  • Poisson statistics
  • distribution mod 1
  • pair correlation

ASJC Scopus subject areas

  • Algebra and Number Theory


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