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Symmetry-resolved entanglement entropy for local and non-local QFTs
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Journal Article
Symmetry-resolved entanglement entropy for local and non-local QFTs
2024
Overview
In this paper, we investigate symmetry-resolved entanglement entropy (SREE) in free bosonic quantum many-body systems. Utilizing a lattice regularization scheme, we compute symmetry-resolved Rényi entropies for free complex scalar fields and a specific class of non-local field theories, where entanglement entropy (EE) exhibits volume-law scaling. We present effective and approximate eigenvalues for the correlation matrix used in computing SREE and demonstrate their consistency with numerical results. Furthermore, we explore the equipartition of EE, verifying its effective behavior in the massless limit. Finally, we comment on EE in non-local quantum field theories and provide an explicit expression for the symmetry-resolved Rényi entropies.
Publisher
Springer Berlin Heidelberg,Springer,Springer Nature B.V,SpringerOpen
