Modular Quantum Device Architecture for Qubit Replacement
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Solution Overview
Problem
Quantum computing devices face challenges with frequency collisions and qubit deterioration, leading to performance issues and the need for entire device replacement, as existing solutions are inefficient, expensive, and lack effective methods for addressing these problems.
Innovation Solution
A modular quantum device architecture using a substrate with qubit pockets, connectors, and transmission lines, allowing for the replacement of individual quantum building blocks and rearrangement to avoid frequency collisions and extend device lifespan by using different materials and determining qubit frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a 2D or 3D grid of qubits is used for quantum processor, then surface code error correction architecture can be implemented, but frequency collision and qubit deterioration occur over time impacting performance
Solution Approach 1:
The quantum processor is divided into multiple independent qubit modules, each with its own control electronics and packaging. This segmentation allows individual qubit replacement without affecting the entire system, addressing the durability issue while maintaining error correction capabilities through the modular architecture.
2Adaptability or versatility
If flux tunable qubit is used to change frequency, then frequency collision can be avoided, but magnetic field adds noise to other qubits causing inefficiencies
Solution Approach 1:
A microwave resonator cavity serves as an intermediary to couple qubits with different frequencies. This allows frequency-tunable qubits to communicate effectively without requiring magnetic field tuning, thereby avoiding the generation of magnetic field noise while maintaining frequency adaptability.
3Reliability
If conventional quantum device replacement is performed when qubits deteriorate, then system performance threshold is maintained, but entire device replacement is required which is inefficient and expensive
Solution Approach 1:
The quantum device is packaged as separate replaceable qubit modules with standardized interfaces. When qubits deteriorate, only the specific module containing the problematic qubits needs to be replaced, not the entire device. This modular approach maintains performance thresholds while dramatically improving replacement efficiency and reducing costs.
4Productivity
If qubits are placed close together for grid architecture, then connectivity is improved, but crosstalk between qubits increases
Solution Approach 1:
Multiple qubits are nested within a shared microwave resonator cavity environment. This nested structure allows close physical proximity for connectivity while the resonator cavity provides electromagnetic isolation, reducing crosstalk between neighboring qubits through the confining and filtering properties of the resonant structure.
Data Source
AI summary
Techniques for a quantum device with modular quantum building blocks are provided. In one embodiment, a device is provided that comprises a substrate that is coupled with a plurality of qubit pockets, where at least one qubit pocket of the plurality of qubit pockets is coupled with a qubit. In one implementation, the device can further comprise a plurality of connectors coupled to the substrate and positioned around at least a portion of the substrate, where the plurality of connectors comprising a connecting element. In one or more implementations, the device can further comprise a plurality of transmission lines formed on the substrate and connect at least one connector of the plurality of connectors to at least one qubit pocket of the plurality of qubit pockets.