Work

Hybrid mechanics of coupled qubits

Year: 2026

Type: article

Abstract: We find that a technique analogous to hybrid mechanics previously developed for Gaussian coherent states and molecular vibrations, can be extended to SU(2) coherent states describing coupled qubits. This formulation reveals a sparse structure of the propagator, leading to a computationally efficient scheme while maintaining numerical accuracy. As a result, the method enables simulations of larger qubit systems on classical computers. In particular, we demonstrate accurate real-time propagation for systems of up to 21 qubits, which would be computationally demanding using straightforward quantum-dynamics approaches.

Source: The Journal of Chemical Physics

DOI: 10.1063/5.0349433

Authors: Merfat Alzomai, Dmitrii V. Shalashilin

Institutions: University of Leeds, Imam Mohammad ibn Saud Islamic University

Language: English

Topic: Quantum Computing Algorithms and Architecture

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,500

Funders: UK Research and Innovation, Imam Mohammed Ibn Saud Islamic University, Al-Imam Muhammad Ibn Saud Islamic University, Engineering and Physical Sciences Research Council