Statistical physics on Euclidean Snyder space: connections with the GUP and cosmological implications

TL;DR

This paper formulates statistical mechanics on Euclidean Snyder space, revealing how momentum-space curvature affects thermodynamics and cosmology, leading to new bounds on noncommutative parameters from early-Universe observations.

Contribution

It introduces a realization independent framework for statistical mechanics on Snyder space, deriving thermodynamic corrections and cosmological implications, and constrains noncommutative parameters using Big Bang Nucleosynthesis data.

Findings

Momentum-space curvature suppresses energy and entropy at high temperatures.

Modified Friedmann equations incorporate Snyder space effects.

Stringent bounds on Snyder and GUP parameters from cosmological data.

Abstract

We develop a systematic formulation of statistical mechanics on Euclidean Snyder space, where noncommutativity is geometrically encoded in the curvature of momentum space. Adopting a realization independent approach based on momentum-space invariants, we derive modified partition functions and thermodynamic quantities for systems obeying Maxwell-Boltzmann, Bose-Einstein and Fermi-Dirac statistics in both non-relativistic and ultrarelativistic regimes. We show that momentum-space curvature induces temperature-dependent corrections that suppress the energy, entropy and energy density with respect to their standard counterparts. We apply these results to early-Universe cosmology, deriving the corresponding corrections to the Friedmann equations driven by the modified energy density of radiation. Using Big Bang Nucleosynthesis as a precision probe, we derive bounds on the Snyder deformation parameter and, via a phenomenological mapping, on the Generalized Uncerainty Principle (GUP) parameter, providing one of the most stringent cosmological and astrophysical constraints currently available. Our analysis demonstrates that high-energy cosmological processes provide a predictive arena for testing momentum-space curvature and noncommutative geometry effects.