Symmetry Resolved Entanglement Entropy in a Non-Abelian Fractional Quantum Hall State

Symmetry-resolved entanglement entropy provides a powerful framework for probing the internal structure of quantum many-body states by decomposing entanglement into contributions from distinct symmetry sectors. In this work, we apply matrix product state techniques to study the bosonic, non-Abelian Moore-Read quantum Hall state, enabling precise numerical evaluation of both the full counting statistics and symmetry-resolved entanglement entropies. Our results reveal an approximate equipartition of entanglement among symmetry sectors, consistent with theoretical expectations and subject to finite-size corrections. The results also show that these expectations for symmetry-resolved entanglement entropy remain valid in the case of a non-Abelian state where the topological sectors cannot be distinguished by the Abelian $\mathrm{U}(1)$ symmetry alone, and where neutral and charged modes possess distinct velocities. We additionally perform a detailed comparison of the entanglement spectrum with predictions from the Li-Haldane conjecture, finding remarkable agreement, and enabling a more precise understanding of the effects of the distinct neutral and charged velocities. This not only provides a stringent test of the conjecture but also highlights its explanatory power in understanding the origin and structure of finite-size effects across different symmetry sectors.

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ArXiv.org
Published
2025-08-07
Primary Topic
Quantum and electron transport phenomena
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article
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article

Symmetry Resolved Entanglement Entropy in a Non-Abelian Fractional Quantum Hall State

Valentin Crépel, Nicolas Regnault, Mark J. Arildsen, Benoit Estienne
ArXiv.org
Quantum and electron transport phenomena
article

Symmetry Resolved Entanglement Entropy in a Non-Abelian Fractional Quantum Hall State

Valentin Crépel, Nicolas Regnault, Mark J. Arildsen, Benoit Estienne
article en

Abstract

Symmetry-resolved entanglement entropy provides a powerful framework for probing the internal structure of quantum many-body states by decomposing entanglement into contributions from distinct symmetry sectors. In this work, we apply matrix product state techniques to study the bosonic, non-Abelian Moore-Read quantum Hall state, enabling precise numerical evaluation of both the full counting statistics and symmetry-resolved entanglement entropies. Our results reveal an approximate equipartition of entanglement among symmetry sectors, consistent with theoretical expectations and subject to finite-size corrections. The results also show that these expectations for symmetry-resolved entanglement entropy remain valid in the case of a non-Abelian state where the topological sectors cannot be distinguished by the Abelian $\mathrm{U}(1)$ symmetry alone, and where neutral and charged modes possess distinct velocities. We additionally perform a detailed comparison of the entanglement spectrum with predictions from the Li-Haldane conjecture, finding remarkable agreement, and enabling a more precise understanding of the effects of the distinct neutral and charged velocities. This not only provides a stringent test of the conjecture but also highlights its explanatory power in understanding the origin and structure of finite-size effects across different symmetry sectors.

ArXiv.org
École Normale Supérieure - PSL (FR), Laboratoire de Physique Théorique et Hautes Energies (FR), Laboratoire de Physique de l'Ecole Normale Supérieure (FR)
Openalex Percentile: Top 78%
Quantum and electron transport phenomena
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Symmetry Resolved Entanglement Entropy in a Non-Abelian Fractional Quantum Hall State — Valentin Crépel, Nicolas Regnault, et al. · ArXiv.org (2025) | TGRS Research Map | TGRS