Mapping a quantum circuit to a quantum processor by performing a light cone analysis

By performing a light cone analysis to identify and prioritize operations based on their impact on observables, the quantum circuit mapping process is optimized for quantum processors, addressing suboptimal mapping issues and enhancing circuit execution performance.

WO2025256894A1PCT designated stage Publication Date: 2025-12-18INTERNATIONAL BUSINESS MACHINE CORPORATION +1
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
PCT/EP2025/064347
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-06-11
Filing Date
2025-05-23
Publication Date
2025-12-18

AI Technical Summary

Technical Problem

Current quantum circuit mapping techniques do not adequately consider the observables evaluated from the quantum circuit output, leading to suboptimal mapping on quantum processors, especially for low-depth circuits, resulting in deviations in circuit execution performance due to variability in gate and measurement errors across superconducting processors.

Method used

Perform a light cone analysis on the quantum circuit to determine which operations fall within or outside the light cones of non-identity operators, prioritizing operations based on their impact on the final observable value, and map them to qubits and gates accordingly to optimize circuit output fidelity.

Benefits of technology

The method ensures that the transformed quantum circuit is optimally mapped to a target device, minimizing errors and maximizing fidelity of the circuit output by prioritizing operations that significantly impact the observable value.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure EP2025064347_18122025_PF_FP_ABST
    Figure EP2025064347_18122025_PF_FP_ABST
Patent Text Reader

Abstract

A method, system, and computer program product for mapping a quantum circuit to a quantum processor. A light cone analysis is performed on the quantum circuit. A light cone refers to a map of the effects that the circuit operations have on the final observable value. Circuit operations that fall outside or within one or more light cones of non-identity operators in an observable based on the light cone analysis on the quantum circuit are then determined. The greater the number of overlapping or individual light cones that such circuit operations lie within, the greater the impact that such circuit operations have on the final observable value. A circuit mapping of the quantum circuit on the quantum processor is then determined based on the determination of which circuit operations fall outside or within the one or more light cones of non-identity operators in the observable.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Detecting a Function Section in a Representation of a Quantum Circuit

    US20240044973A1