Anonymous broadcasting of classical information with a continuous-variable topological quantum code

TL;DR

This paper introduces a quantum protocol for anonymous classical information broadcasting using a continuous-variable surface-code state, leveraging current technology for scalable, error-robust, and high-bandwidth communication.

Contribution

It presents a novel anonymous broadcasting protocol utilizing a continuous-variable topological quantum code that is scalable and compatible with existing technology.

Findings

High squeezing improves transmission bandwidth and anonymity

Topological nature enables local error mitigation

Protocol is feasible with current technology

Abstract

Broadcasting information anonymously becomes more difficult as surveillance technology improves, but remarkably, quantum protocols exist that enable provably traceless broadcasting. The difficulty is making scalable entangled resource states that are robust to errors. We propose an anonymous broadcasting protocol that uses a continuous-variable surface-code state that can be produced using current technology. High squeezing enables large transmission bandwidth and strong anonymity, and the topological nature of the state enables local error mitigation.