Implementing the Deutsch's algorithm with spin-orbital angular momentum of photon without interferometer

TL;DR

This paper proposes a stable, interferometer-free optical scheme to implement Deutsch's quantum algorithm using photon spin-orbital angular momentum and a q-plate device, advancing quantum computing techniques.

Contribution

It introduces a novel, high-stability method for executing Deutsch's algorithm with photons' spin-orbital angular momentum without interferometers.

Findings

The scheme is theoretically stable and efficient.

It utilizes a q-plate to manipulate photon angular momentum.

No interferometer is required, simplifying implementation.

Abstract

Deutsch's algorithm is the simplest quantum algorithm which shows the acceleration of quantum computer. In this paper, we theoretically advance a scheme to implement quantum Deutsch's algorithm in spin-orbital angular momentum space. Our scheme exploits a newly developed optical device called "q-plate", which can couple and manipulate the spin-orbital angular momentum simultaneously. This experimental setup is of high stability and efficiency theoretically for there is no interferometer in it.