Quantum Computing Qubit Management via Layered Mapping
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Solution Overview
Problem
Current quantum computing systems face inefficiencies in managing and processing large-scale qubits due to differences in physical features such as coherence time, error rate, and connectivity between qubits, which complicates the allocation and utilization of qubits across various quantum chips.
Innovation Solution
A quantum computing system with a management device that generates physical, abstraction, and logical qubit mappings to provide regular connectivity and efficient allocation of qubits, using a layered approach to abstract physical qubit variations and optimize qubit allocation for quantum application programs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If physical qubits with different physical features are used across multiple quantum chips, then the system can support large-scale qubits with diverse characteristics, but it becomes difficult to manage and allocate qubits efficiently due to irregular connectivity and varying properties
Solution Approach 1:
The system divides the quantum chip into multiple qubit groups, where each group contains physical qubits with similar connectivity patterns and physical features. This segmentation allows the management device to handle each group independently through separate mapping relationships, reducing the overall management complexity while supporting large numbers of qubits across multiple chips.
Solution Approach 2:
The management device acts as an intermediary layer between the physical qubits and the quantum application program. It maintains mapping relationships that translate irregular physical connectivity into regular logical connectivity, allowing applications to access qubits through a simplified interface without needing to understand the underlying physical complexity.
2Ease of operation
If direct mapping between physical qubits and application qubits is used, then the system structure is simple, but it cannot provide regular connectivity and efficient allocation when physical qubits have irregular connectivity patterns
Solution Approach 1:
The system introduces an additional mapping dimension by creating intermediate qubit groups and maintaining multiple layers of mapping relationships (physical qubits to qubit groups, and qubit groups to application qubits). This dimensional expansion transforms the irregular one-to-one mapping problem into a structured multi-level mapping system that provides regular connectivity patterns.
Solution Approach 2:
The mapping structure is segmented into discrete qubit groups rather than treating all qubits as a single pool. Each group has its own mapping relationship, which simplifies the allocation process by breaking down the complex global mapping into manageable local mappings that can be handled independently.
3Adaptability or versatility
If quantum application programs access physical qubits directly, then the system has low overhead, but it requires programs to handle irregular connectivity and varying physical features, reducing ease of use
Solution Approach 1:
The management device serves as an intermediary that shields quantum application programs from the complexities of physical qubit variations. It provides a unified interface for qubit access while handling the translation to specific physical qubits based on their features and connectivity, allowing programs to write portable code that works across different quantum chip configurations.
Solution Approach 2:
The qubit group mapping mechanism provides universal access patterns that work across different quantum chip types and configurations. By grouping qubits with similar properties and providing standardized mapping interfaces, the system enables a single quantum application program to operate on diverse hardware platforms without modification.
Data Source
AI summary
Disclosed is a quantum computing system including a first quantum chip including first physical qubits, a second quantum chip including second physical qubits, and a management device. The management device includes a physical qubit layer that manages physical qubit mapping including information about physical channels between first and second physical qubits, an abstraction qubit layer that manages abstraction qubit mapping including information about abstraction qubits and abstraction channels between the abstraction qubits based on the physical qubit mapping, a logical qubit layer that divides the abstraction qubits into logical qubits and to manage logical qubit mapping including information about logical channels between the logical qubits, based on the abstraction qubit mapping, and an application qubit layer that allocates at least one logical qubit corresponding to a qubit request received from a quantum application program based on the logical qubit mapping.