“School of Particles”
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| Paper IPM / Particles / 17463 |
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| Abstract: | |||||
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In this paper, we study symmetry-resolved entanglement entropy in free bosonic quan-
tum many-body systems. Precisely, by making use of the lattice regularization scheme,
we compute symmetry-resolved R´enyi entropies for free complex scalar fields as well as for
a simple class of non-local field theories in which entanglement entropy exhibits volume-
law scaling. We present effective expressions for the eigenvalues of the correlation matrix
used to compute the symmetry-resolved entanglement entropy and show that they are
consistent with the numerical results. Furthermore, we explore the equipartition of en-
tanglement entropy and verify an effective equipartition in the massless limit. Finally,
we make a comment on the entanglement entropy in the non-local quantum field theories
and write down an explicit expression for the symmetry-resolved R´enyi entropies.
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