Quantum Gravity, CPT symmetry and Entangled States

TL;DR

This paper discusses potential experimental signatures of CPT symmetry breakdown caused by quantum gravity effects, focusing on entangled neutral meson states and the observable omega-effect in particle factories.

Contribution

It introduces the concept of the omega-effect as a signature of CPT violation in quantum gravity models and evaluates its detectability in future particle physics experiments.

Findings

Bounds on the omega-effect from current experiments

Potential for next-generation facilities to falsify the effect

Implications for CPT symmetry in quantum gravity theories

Abstract

There may unique ("smoking-gun") signatures of the breakdown of CPT symmetry, induced in some models of Quantum Gravity entailing decoherence for quantum matter. Such effects can be observed in entangled states of neutral mesons via modifications of the respective Einstein-Podolsky-Rosen (EPR) correlators ("omega"-effect). In the talk I discuss experimental signatures and bounds of the omega-effect in Phi- and B-factories, and argue that the effect might be falsifiable at the next generation facilities.