Bit Transmission Probability Maximizing the Key Rate of the BB84 Protocol

TL;DR

This paper proposes a method to improve the key generation rate of the BB84 quantum key distribution protocol by optimizing the transmission probabilities of individual qubits within the same polarization basis.

Contribution

It introduces a novel approach of assigning different transmission probabilities to each qubit, surpassing the traditional equal probability scheme in BB84.

Findings

Enhanced key rate through probability optimization

Higher secure key generation rate achieved

Method applicable within existing BB84 framework

Abstract

In all papers on the BB84 protocol, the transmission probability of each bit value is usually set to be equal. In this paper, we show that by assigning different transmission probability to each transmitted qubit within a single polarization basis, we can generally improve the key generation rate of the BB84 protocol and achieve a higher key rate.