On a Formulation of Qubits in Quantum Field Theory

TL;DR

This paper refines the concept of qubits within quantum field theory, introducing QFTbits that incorporate gauge invariance, thus broadening the foundational understanding of quantum information carriers in field theories.

Contribution

It proposes a generalized notion of qubits, called QFTbits, grounded in gauge invariance, expanding the conceptual framework of quantum information in quantum field theory.

Findings

Introduction of QFTbits as generalized qubits

Gauge invariance leads to the concept of QFTbits

Highlights the foundational role of QFTbits in quantum field theory

Abstract

Qubits have been designed in the framework of quantum mechanics. Attempts to formulate the problem in the language of quantum field theory have been proposed already. In this short note we refine the meaning of qubits within the framework of quantum field theory. We show that the notion of gauge invariance naturally leads to a generalization of qubits to QFTbits which are then the fundamental carriers of information from the quantum field theoretical point of view. The goal of this note is to stress the availability of such a generalized concept of QFTbits.