Quantum Cryptography Using Momentum and Position Variables in a Simple Optical Arrangement

TL;DR

This paper demonstrates an experimental quantum key distribution method using position and momentum states in an optical setup, adapting the BB84 protocol for practical implementation.

Contribution

It introduces a novel experimental approach to QKD utilizing position and momentum variables with a simple optical system.

Findings

Successful implementation of QKD with position and momentum states

Demonstration of a Fourier transform-based setup for quantum communication

Potential for practical quantum cryptography systems

Abstract

In this work, we explore an experimental implementation of quantum key distribution (QKD) using position and momentum quantum states. By employing a setup that includes a laser, a slit, and lenses to generate a Fourier transform, we demonstrate a variation of the BB84 protocol. Our technique shows how a system with these characteristics can be implemented within a quantum framework.