Story perspectives

Classiq, Rolls-Royce Cut Quantum CFD Resources Tenfold

6/17/2026

Summary

Story summary

Classiq Technologies and Rolls-Royce published research on a hybrid classical-quantum CFD workflow.
They added a Chebyshev linear combination of unitaries (Cheb-LCU) quantum solver to a nozzle simulation with transonic shocks.
The Cheb-LCU approach reduced quantum resource use by over tenfold compared with a Quantum Singular Value Transformation solver.
Classiq released the solver in a library and plans to scale the method to larger CFD problems, noting a minor runtime penalty.

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Story summary

Classiq Technologies and Rolls-Royce published research on a hybrid classical-quantum CFD workflow.
They added a Chebyshev linear combination of unitaries (Cheb-LCU) quantum solver to a nozzle simulation with transonic shocks.
The Cheb-LCU approach reduced quantum resource use by over tenfold compared with a Quantum Singular Value Transformation solver.
Classiq released the solver in a library and plans to scale the method to larger CFD problems, noting a minor runtime penalty.