Electromagnetic Shielding for Quantum Qubit Decoherence
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Solution Overview
Problem
Ionizing radiation from environmental radioactive materials and cosmic rays limits the coherence times of quantum bits (qubits) in quantum computing applications, leading to decoherence issues that are challenging to mitigate effectively.
Innovation Solution
An electromagnetic shield using coiled circuitry elevated relative to the target area is generated by driving current through the circuitry, creating a field that diverts radiation and mitigates qubit decoherence by casting a cosmic ray shadow over the area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If quantum circuitry is placed underground to block radiation, then radiation shielding is improved, but implementation cost and complexity increase significantly
Solution Approach 1:
The patent replaces the mechanical/physical barrier approach (placing quantum circuitry underground) with an electromagnetic field-based shielding system. Electromagnetic coils generate fields that deflect cosmic rays and muons before they reach the quantum circuitry, eliminating the need for extensive underground infrastructure while achieving comparable or superior radiation protection.
Solution Approach 2:
The patent introduces electromagnetic fields as an intermediary between the cosmic radiation sources and the quantum circuitry. The electromagnetic coils create a protective field barrier that intercepts and deflects charged particles (muons and cosmic rays), preventing them from directly interacting with the quantum bits while allowing the system to remain accessible and easily deployable.
2Object-affected harmful factors
If electromagnetic shielding is implemented using elevated coiled circuitry, then radiation shielding effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent divides the shielding system into discrete electromagnetic coil segments that can be independently configured and positioned. These segmented coils are arranged in specific patterns (such as Helmholtz configurations) to create the necessary electromagnetic field distribution, allowing for modular implementation and easier adjustment to different shielding requirements without designing a completely complex integrated system.
Solution Approach 2:
The patent transitions from three-dimensional physical shielding structures (like underground bunkers) to a field-based approach where electromagnetic coils positioned in specific spatial arrangements create protective zones. This dimensional shift allows shielding to be implemented through field distribution rather than mass, reducing structural complexity while maintaining or enhancing shielding effectiveness.
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
This approach significantly reduces muon flux and decoherence rates by a factor of over 30000, enhancing the coherence times of superconducting qubits and facilitating the development of fault-tolerant quantum computers.
Implementation Method 1
an electromagnetic field is generated over the target area by driving current through the coiled circuitry
Implementation Method 2
The electromagnetic field may be used to divert radiation propagating in a direction toward the target area
Data Source
AI summary
Aspects of the present disclosure are directed to mitigating qubit decoherence in quantum circuitry in a target area. Using electromagnetic circuitry having coiled circuitry and being coupled to a structure in an elevated position relative to the target area, an electromagnetic field is generated over the target area by driving current through the coiled circuitry. The electromagnetic field may be used to divert radiation propagating in a direction toward the target area, therein electromagnetically shielding the target area and mitigating qubit decoherence in the quantum circuitry.