Proposal of an eavesdropping experiment for BB84 QKD protocol with 1-3 phase-covariant quantum cloner

TL;DR

This paper proposes an optical eavesdropping experiment on the BB84 quantum key distribution protocol using a 1-3 phase-covariant quantum cloner, including circuit design and measurement optimization for practical implementation.

Contribution

It introduces a novel optical circuit for a 1-3 phase-covariant quantum cloner and optimizes Eve's measurement scheme for effective eavesdropping in BB84.

Findings

Designed an optical circuit for the quantum cloner

Optimized measurement scheme for Eve

Easily implementable with linear optics

Abstract

We propose an eavesdropping experiment with linear optical 1-3 phase-covariant quantum cloner. In this paper, we have designed an optical circuit of the cloner and shown how the eavesdropper (Eve) utilizes her clones. We have also optimized the measurement scheme for Eve by numerical calculation. The optimized measurement is easy to implement with liner optics.