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arXiv · 2604.04046

Dismagicker: Unitary Gate for Non-Stabilizerness Reduction

Jiale Huang·Rongyi Lv·Xiangjian Qian·Mingpu Qin
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Abstract

We introduce the notion of dismagicker: non-Clifford unitary gate designed to reduce the non-stabilizerness (also called magic) of quantum many-body states. Although both entanglement and non-stabilizerness are fundamental quantum resources, they require distinct control strategies. While disentanglers (unitary operations that lower entanglement) are well-established in tensor network methods, analogous concept for non-stabilizerness suppression has been largely missing. In this work, we define dismagicker as non-Clifford unitary operation that actively suppresses non-stabilizerness, steering states toward classically simulatable stabilizer states. We develop optimization method for constructing dismagickers within the Matrix Product States framework. Our numerical results show that the non-stabilizerness reduction procedure, when combined with entanglement reduction steps with Clifford circuits, significantly improves the accuracy for both classical simulation of many-body systems and quantum state preparation on quantum devices. Dismagicker enriches our toolkit for the manipulation of many-body states by unifying non-stabilizerness and entanglement reduction.

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Jiale Huang, Rongyi Lv, Xiangjian Qian, Mingpu Qin. 2026-04-05. Dismagicker: Unitary Gate for Non-Stabilizerness Reduction. https://arxiv.org/abs/2604.04046

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