Multi-Substrate Quantum Processor Coupling via Superconducting Interconnects
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Solution Overview
Problem
Current quantum computing technologies face challenges in scaling due to the difficulty in maintaining qubit coherence over extended periods, which is essential for practical implementation of circuit model quantum computers, and in efficiently coupling qubits across multiple substrates to facilitate quantum information transfer.
Innovation Solution
A multi-chip processor architecture that enables coupling of qubits across multiple substrates using superconducting materials and Josephson junctions, allowing for the entanglement of qubits and efficient transfer of quantum information through magnetic flux induction, thereby overcoming coherence limitations and enabling scalable quantum processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If qubits are maintained for extended periods to perform computational operations, then quantum coherence is required, but coherence time is limited and qubits lose their quantum state
Solution Approach 1:
The quantum processor is divided into multiple substrates, each carrying a portion of the qubits. This segmentation allows for modular management of quantum coherence, where each substrate can be independently controlled and optimized for coherence maintenance, reducing the overall system complexity in maintaining long-term coherence across the entire processor.
Solution Approach 2:
Coupling devices are introduced as intermediary elements between qubits on different substrates. These coupling devices facilitate quantum interaction and information transfer while allowing qubits to maintain their coherence independently on separate substrates, effectively mediating the interaction without requiring direct long-distance coherence maintenance.
2Productivity
If qubits are coupled across multiple substrates to increase processing capacity, then quantum information transfer is enabled, but coupling complexity and signal loss increase
Solution Approach 1:
The quantum processor is divided into multiple substrates, each carrying a portion of the qubits. This segmentation allows for modular management of quantum coherence, where each substrate can be independently controlled and optimized for coherence maintenance, reducing the overall system complexity in maintaining long-term coherence across the entire processor.
Solution Approach 2:
Coupling devices are introduced as intermediary elements between qubits on different substrates. These coupling devices facilitate quantum interaction and information transfer while allowing qubits to maintain their coherence independently on separate substrates, effectively mediating the interaction without requiring direct long-distance coherence maintenance.
3Quantity of substance
If more qubits are integrated to increase computational power, then quantum processing capability improves, but maintaining coherence across all qubits becomes more difficult
Solution Approach 1:
The quantum processor is divided into multiple substrates, each carrying a portion of the qubits. This segmentation allows for modular management of quantum coherence, where each substrate can be independently controlled and optimized for coherence maintenance, reducing the overall system complexity in maintaining long-term coherence across the entire processor.
Solution Approach 2:
Each substrate is designed with universal coupling interfaces and standardized qubit configurations, allowing multiple substrates to be interconnected in various configurations. This universality enables scalable expansion of qubit数量 while maintaining consistent coherence management protocols across all substrates, making the system adaptable to different computational requirements.
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 enhances the scalability of quantum processors by maintaining qubit coherence and facilitating quantum information transfer between substrates, potentially leading to more efficient and practical quantum computing capabilities.
Implementation Method 1
allowing for the entanglement of qubits and efficient transfer of quantum information through magnetic flux induction
Implementation Method 2
A multi-chip processor including a first plurality of quantum devices carried by a first substrate; a second plurality of quantum devices carried by a second substrate; and a multi-substrate couplable quantum device coupled to a first quantum device of the first plurality of quantum devices and a second quantum device of the second plurality of quantum devices. At least one of a quantum device from the first plurality of quantum devices, a quantum device from the second plurality of quantum devices and the multi-substrate couplable quantum device may be a loop of superconducting material interrupted by at least one Josephson junction.
Implementation Method 3
At least one of a quantum device from the first plurality of quantum devices, a quantum device from the second plurality of quantum devices and the multi-substrate couplable quantum device may be a loop of superconducting material interrupted by at least one Josephson junction.
Data Source
AI summary
Multiple substrates that carry quantum devices are coupled to provide quantum mechanical communicators therebetween, for example, using superconducting interconnects, vias, solder and/or magnetic flux. Such may advantageously reduce a footprint of a device such as a quantum processor.