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

2025/05/07 by Arias, Alejandro, Baptiste Sevilla, Sevilla, Baptiste
Computer Science · Physics and Astronomy · #BB84 #FOS: Physical sciences #Fourier transform #Momentum (technical analysis) #Orbital Angular Momentum in Optics #Position (finance) #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Physics (quant-ph) #Quantum algorithm #Quantum cryptography #Quantum error correction #Quantum key distribution #Quantum network

paper · pdf · doi:10.48550/arxiv.2505.04261

published in arXiv (Cornell University) (Cornell University)

openalex publication_date 2025/05/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Quantum cryptography: Public key distribution and coin tossing
• Gaussian quantum information

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