Quantum voting machine encoded with microwave photons

TL;DR

This paper introduces a scalable quantum voting machine using microwave photon qubits, leveraging a multi-control single-target quantum phase gate for simple, verifiable, and anonymous voting, feasible with current quantum technology.

Contribution

It presents a novel quantum voting scheme based on microwave photons that is simple, verifiable, anonymous, scalable, and adaptable to various physical systems.

Findings

Feasibility demonstrated through numerical simulations.

Single-step operation simplifies the voting process.

Ensures voter anonymity and verifiability.

Abstract

We propose a simple quantum voting machine using microwave photon qubit encoding, based on a setup comprising multiple microwave cavities and a coupled superconducting flux qutrit. This approach primarily relies on a multi-control single-target quantum phase gate. The scheme offers operational simplicity, requiring only a single step, while ensuring verifiability through the measurement of a single qubit phase information to obtain the voting results. And it provides voter anonymity, as the voting outcome is solely tied to the total number of affirmative votes. Our quantum voting machine also has scalability in terms of the number of voters. Additionally, the physical realization of the quantum voting machine is general and not limited to circuit QED. Quantum voting machine can be implemented as long as the multi-control single-phase quantum phase gate is realized in other physical systems. Numerical simulations indicate the feasibility of this quantum voting machine within the current quantum technology.