High-dimensional cryptographic quantum parameter estimation

TL;DR

This paper explores a high-dimensional quantum system for cryptographic parameter estimation, enhancing security and precision, with potential applications in multi-parameter scenarios.

Contribution

It introduces a high-dimensional quantum estimation protocol that improves precision and security over traditional two-dimensional systems, and extends to multi-parameter cases.

Findings

High-dimensional systems improve estimation precision.

Eavesdropper cannot access parameter information.

Protocol generalizes to multiple parameters.

Abstract

We investigate cryptographic quantum parameter estimation with a high-dimensional system that allows only Bob (Receiver) to access the result and achieve optimal parameter precision from Alice (Sender). Eavesdropper (Eve) only can disturb the parameter estimation of Bob, but she can not obtain the information of parameter. We analyze the security and show that the high-dimensional system can help to utilize the resource to obtain better precision than the two-dimensional system. Finally, we generalize it to the case of multi-parameter.