Quantum Cloning for Absolute Radiometry

TL;DR

This paper proposes a quantum cloning-based method for absolute radiometry, enabling direct measurement of radiated power and paving the way for a practical primary standard in quantum metrology.

Contribution

It introduces a novel quantum cloning approach to measure radiated power directly, bridging quantum information theory and radiometry.

Findings

Quantum cloning fidelity relates to radiated power measurement.

Method enables a potential primary standard for radiometry.

Demonstrates practical application of quantum information principles.

Abstract

In the quantum regime information can be copied with only a finite fidelity. This fidelity gradually increases to 1 as the system becomes classical. In this article we show how this fact can be used to directly measure the amount of radiated power. We demonstrate how these principles could be used to build a practical primary standard.