Quantum

Exact verification of Givens rotation circuits for efficient quantum phase estimation of iron-sulfur clusters

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 30/10/2026, 06:43:25 UTC.

Briefings

A new arXiv preprint (2610.37847v1) proposes an exact verification method for Givens rotations in quantum phase estimation, claiming to reduce Toffoli counts by 9.5-14.3% for iron-sulfur clusters like FeMoco. The authors argue that separating Clifford basis changes allows for more efficient adder fusions, though the paper explicitly states it does not verify the original published algorithm's correctness.

Key points

• The paper introduces a method to verify Givens rotations by tracking basis states and phases after a fixed Clifford change of basis.
• Replacing the rotation term in quantum phase estimation for FeMoco reduces Toffoli counts by 9.5-14.3% under the published error budget.

Context

This research addresses the verification of quantum phase estimation algorithms, specifically those using double-factorized tensor hypercontraction. The findings are based on a preprint from arXiv, which is not peer-reviewed and may contain unverified claims about algorithmic improvements.

Limitations

The evidence is limited to a single arXiv preprint (2610.37847v1) from October 2026. The paper does not verify the correctness of the original published algorithm, nor does it confirm the 9.5-14.3% Toffoli count savings for all iron-sulfur clusters.

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