Multistatic Quantum Radar With Shared Entanglement for Low-SNR Detection

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Solution Overview

Problem

Classical radar systems face limitations in detection probability, especially in low signal-to-noise ratio regimes, and are susceptible to interference, while existing quantum radar designs are complex and costly, necessitating a more efficient and cost-effective entanglement-assisted quantum radar solution.

Innovation Solution

A system employing entangled transmitters with transmitter-side optical phase conjugation and classical coherent detection, utilizing a single broadband entangled source and wavelength division multiplexing, to enhance target detection probability and resilience to turbulence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If quantum radar designs are implemented to improve detection probability and resilience to interference, then detection performance is improved, but system complexity and cost increase

Engineering Contradiction:

Improvedetection probabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple entangled transmitters sharing a common entangled source with a joint receiver, merging quantum resources to achieve enhanced detection probability while managing system complexity through shared infrastructure

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The joint receiver performs multiple functions including detecting signals from multiple transmitters, processing entangled photon pairs, and operating across different wavelength divisions, reducing the need for separate specialized components

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If entangled transmitters with optical phase conjugation are used to improve detection probability, then detection performance is improved, but system cost increases

Engineering Contradiction:

Improvedetection probabilityVSAvoidsystem cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Multiple transmitters share a single broadband entangled source, reducing the overall system cost by eliminating the need for multiple independent entangled sources while maintaining enhanced detection probability through coordinated transmission

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The broadband entangled source serves multiple transmitters simultaneously across different wavelength divisions, providing a cost-effective universal quantum resource that replaces multiple specialized components

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If wavelength division multiplexing is implemented to reduce system complexity, then ease of operation is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveease of operationVSAvoidmanufacturing complexity

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The broadband entangled source provides universal quantum resources across multiple wavelength divisions, allowing a single source to serve multiple transmitters and simplifying operation while the manufacturing complexity is managed through integrated design

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The proposed system significantly improves detection probability and reduces system complexity and cost by leveraging entanglement-assisted joint multistatic radar, outperforming classical and existing quantum radar schemes.

Implementation Method 1

Each entangled transmitter of the plurality of entangled transmitters generates at least one entangled pair of photons

Methodology Applied

Scientific EffectSpontaneous parametric down conversion:

Implementation Method 2

employing an integrated entangled source shared among multiple transmitters and performing the optical phase conjugation on transmitter side

Methodology Applied

Scientific EffectOptical phase conjugation:

Implementation Method 3

The forward-scattered photons are detected by the receivers (or a joint measurement receiver)

Methodology Applied

Scientific EffectCoherent detection: Homodyne Detection

Data Source

PatentUS20260050070A1Systems and methods for entanglement assisted multistatic quantum radar

Publication Date: 2026.02.19 THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIV OF ARIZONA

AI summary

An entanglement-assisted multistatic quantum radar detection technique employs the integrated entangled source shared among multiple transmitters and performing transmit side optical phase conjugation. EA receivers are based on classical homodyne detection schemes. The EA multistatic radar detection technique is evaluated against bistatic radar EA detection scheme and various coherent states-based quantum detection schemes (the optimum quantum detector. Helstrom threshold detector, and random phase optimum quantum detector). The EA multistatic target detection probability is significantly better than that of corresponding bistatic radar EA detection techniques. coherent states-based quantum detection techniques. and the classical radar detection schemes. When both scattered signal photon channels and idler channels are noisy and lossy, the scheme significantly outperforms the EA bistatic radar scheme.