Strongest atomic physics bounds on Non-Commutative Quantum Gravity Models

TL;DR

This paper uses atomic physics experiments to set the strongest bounds on Non-Commutative Quantum Gravity models, testing space-time structure through violations of the Pauli Exclusion Principle.

Contribution

It provides new experimental bounds on Non-Commutative Quantum Gravity models, surpassing previous limits and constraining the parameter space of these theories.

Findings

VIP-2 experiment excludes certain Non-Commutative models far above the Planck scale.

Sets bounds up to 6.9 x 10^{-2} Planck scales for specific model parameters.

Provides the strongest constraints on space-time non-commutativity to date.

Abstract

Investigations of possible violations of the Pauli Exclusion Principle represent critical tests of the microscopic space-time structure and properties. Space-time non-commutativity provides a class of universality for several Quantum Gravity models. In this context the VIP-2 Lead experiment sets the strongest bounds, searching for Pauli Exclusion Principle violating atomic-transitions in lead, excluding the $\theta$-Poincar\'e Non Commutative Quantum Gravity models far above the Planck scale for non-vanishing $\theta_{\mu \nu}$ ``electric-like'' components, and up to $6.9 \cdot 10^{-2}$ Planck scales if $\theta_{0i} = 0$.