Quantum frameness for Charge-Parity-Time (CPT) inversion symmetry

TL;DR

This paper develops a resource theory for CPT symmetry, showing how different particles can serve as quantum information resources under CPT superselection, with implications for quantum processing capabilities.

Contribution

It introduces a CPT frameness resource theory, quantifies it for various particles, and demonstrates the potential for quantum information processing under CPT superselection.

Findings

Spin 0 particles only support classical information processing.

Higher-spin particles enable quantum information processing with CPT superselection.

CPT inversion treated as an indecomposable operation to avoid anti-unitarity issues.

Abstract

We develop a charge-parity-time (CPT) frameness resource theory to circumvent CPT- superselection. We construct and quantify such resources for spins 0, 1/2, and 1 and for Majorana particles, and we show that spin 0 particles only admit classical information processing whereas particles of higher-dimensional spin permit quantum information processing in the presence of CPT-superselection. Our treatment of CPT inversion as indecomposable circumvents the anti-unitarity of certain actions (C and T) by strictly considering the aggregate CPT.