Silicon Spin-Qubit Radar Using FET Gate Control for 4D Detection
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Solution Overview
Problem
Current quantum illumination solutions are optical-based, complex, lack scalability, and are limited in application, only enabling basic target presence detection in a single azimuth, elevation, and range hypothesis, failing to provide complete 4-Dimension target detection.
Innovation Solution
A silicon-based spin-qubit quantum radar system with all-electrical control, utilizing FETs with Back-Gates and Front-Gates to induce spin qubit rotation and measure echo signals, allowing for scalable 4-Dimension target detection through multiple range bins and antenna configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical-based quantum entanglement is used to achieve extreme sensitivity in radar detection, then detection sensitivity is improved, but device complexity increases and scalability is reduced
Solution Approach 1:
The patent replaces optical-based quantum entanglement systems with silicon-based spin-qubit systems that use electrical fields instead of optical components. The FET structure with back-gate and front-gate controls spin qubits through electrical means, eliminating complex optical waveguides, entangled photon sources, and electro-opto-mechanical converters, thereby reducing device complexity while maintaining quantum-enhanced detection sensitivity
Solution Approach 2:
The patent changes the fundamental operating parameters from optical frequency to microwave frequency, and from optical entanglement to spin-qubit entanglement. This parameter change enables the system to operate in the electrical domain using standard silicon FET technology, reducing complexity while preserving quantum sensitivity through spin-qubit coherence and entanglement
2Measurement precision
If optical-based quantum illumination is used for target detection, then detection sensitivity is improved, but adaptability and application scope are limited
Solution Approach 1:
The silicon-based spin-qubit radar system provides universal functionality by enabling complete 4-Dimension target detection (range, azimuth, elevation, velocity) through multiple magnetometer elements and signal processing capabilities. The system can detect target presence, determine spatial position, measure velocity via Doppler shift, and operate in various environmental conditions, making it adaptable to diverse applications including radar, mineral prospecting, astronomy, and medical imaging
Solution Approach 2:
The patent implements dynamic control of spin qubits through time-varying gate voltages on the FET structure. The back-gate and front-gate can dynamically adjust spin-qubit energy levels, coupling strengths, and resonance frequencies, enabling the system to adapt to different detection scenarios, target types, and environmental conditions, thereby expanding application versatility
3Measurement precision
If optical-based quantum entanglement is used for radar detection, then target presence detection is achieved, but complete 4-Dimension target detection is not possible
Solution Approach 1:
The patent segments the detection function across multiple independent magnetometer elements, each capable of detecting electromagnetic signals from different spatial directions. By arranging multiple FET-based spin-qubit sensors and processing their signals independently, the system can simultaneously determine target range, azimuth, elevation, and velocity, achieving complete 4-Dimension target detection that overcomes the single-hypothesis limitation of optical quantum illumination
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
Enables precise 4-Dimension target detection with full electrical control, overcoming scalability and application limitations of current quantum illumination solutions, suitable for sensitive radar applications and mineral/mining prospecting.
Implementation Method 1
the target-reflected microwave (MW) frequency for a given range bin will induce a spin qubit rotation of the underlying Quantum Dot (QD) sitting underneath the Manipulation (M) gate at a Rabi frequency proportional to the magnitude of the returned echo signal
Implementation Method 2
each magnetometer sensing element (aka range bin magnetometer) is built around a FET (Field Effect Transistor) on silicon over insulator with a Back-Gate (BG) as well as two Front Gates (FG)
Data Source
AI summary
Embodiments of the present disclosure provide a spin-qubit quantum magnetometer and radar apparatus, entirely implemented in silicon and with full electrical control. By default, each detection element of the silicon-based spin-qubit quantum magnetometer and radar apparatus with full electrical control of the invention is built around a Field Effect Transistor (FET) on silicon over insulator with a back-gate as well as two front gates, which can be adjacent to one another along the Drain-Source FET channel or alternatively placed across that same channel and facing each other as corner gates.