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Experts Warn: Quantum Chemistry Algorithms Face Major Limitations

3/13/2026

Summary

Story summary

Two leading quantum chemistry algorithms face limited applicability, according to researchers at CEA Grenoble.
The variational quantum eigensolver (VQE) is highly sensitive to noise.
For quantum phase estimation (QPE), energy calculations worsen as molecule size grows.
Experts warn against overestimating quantum computers’ chemistry potential, citing persistent challenges.
Nevertheless, quantum computers may aid the simulation of chemical changes under specific conditions.

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Story summary

Two leading quantum chemistry algorithms face limited applicability, according to researchers at CEA Grenoble.
The variational quantum eigensolver (VQE) is highly sensitive to noise.
For quantum phase estimation (QPE), energy calculations worsen as molecule size grows.
Experts warn against overestimating quantum computers’ chemistry potential, citing persistent challenges.
Nevertheless, quantum computers may aid the simulation of chemical changes under specific conditions.