Modeling Entanglement-Based Quantum Key Distribution for the NASA Quantum Communications Analysis Suite

TL;DR

This paper presents a Monte Carlo-based model for entanglement-based quantum key distribution within NASA's Quantum Communications Analysis Suite, validated against experimental data to support future space communication applications.

Contribution

It introduces a new QKD link budget model using NQCAS inputs, validated with experimental data, to aid in designing space-based quantum communication systems.

Findings

Model generates key rates, error rates, and S values consistent with experimental data.

Preliminary comparisons support the model's validity for space communication scenarios.

Verified model will guide future NASA quantum communication experiments.

Abstract

One of the most practical, and sought after, applications of quantum mechanics in the field of information science is the use of entanglement distribution to communicate quantum information effectively. Similar to the continued improvements of functional quantum computers over the past decade, advances in demonstrations of entanglement distribution over long distances may enable new applications in aeronautics and space communications. The existing NASA Quantum Communications Analysis Suite (NQCAS) software models such applications, but limited experimental data exists to verify the model's theoretical results. There is, however, a large body of experimental data in the relevant literature for entanglement-based quantum key distribution (QKD). This paper details a Monte Carlo-based QKD model that uses NQCAS input parameters to generate an estimated QKD link budget for verification of NQCAS. The model generates link budget statistics like key rates, error rates, and S values that can then be compared to the experimental values in the literature. Preliminary comparisons show many similarities between the simulated and experimental data, supporting the model's validity. A verified NQCAS model will inform experimental work conducted in Glenn Research Center's (GRC) NASA Quantum Metrology Laboratory (NQML), supporting the United States Quantum Initiative and potential NASA missions.