Method for constructing excitation operator in variational quantum eigen solution algorithm
A novel basis transformation method for quantum computing was constructed by performing basis transformations on CRY and C3RY gates, which solves the problem of excessive quantum circuit depth and improves the computational efficiency of NISQ devices.
CN119294539BActive Publication Date: 2025-11-18BEIJING ZHONGKE ARCLIGHT QUANTUM SOFTWARE TECH CO LTD
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Patent Information
- Application Number
- CN202411104851.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2044-08-13
AI Technical Summary
Technical Problem
In existing quantum computing devices, the quantum circuit depth of the variational quantum eigenvalue solving algorithm is too large, resulting in poor computational quality on NISQ devices, and the excessive number of CNOT gates affects computational efficiency.
Method used
By performing basis transformations on CRY and C3RY gates, quantum circuits with single-excitation and double-excitation operators are constructed, reducing the number of CNOT gates used and decreasing the depth of the quantum circuits.
Benefits of technology
It reduces the depth of quantum circuits, improves computational quality on NISQ devices, reduces the number of CNOT gates used, and reduces costs by approximately 45%.
✦ Generated by Eureka AI based on patent content.
Abstract
The application provides a construction method of an excitation operator in a variational quantum eigenvalue solution algorithm, and the method comprises the following steps: constructing a quantum circuit of a single excitation operator by performing basis transformation on a CRY gate; and constructing a quantum circuit of a double excitation operator by performing basis transformation on a C3RY gate. In the technical scheme, the quantum circuit of the single excitation operator is constructed by performing the basis transformation on the CRY gate, and the quantum circuit of the double excitation operator is constructed by performing the basis transformation on the C3RY gate, so that the number of CNOT gates is reduced, and the depth of the quantum circuit is reduced.
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