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2020-07-02

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cc-by (c) Morera Navarro, Ivan et al., 2020
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/179876

Entanglement entropy in low-energy field theories at a finite chemical potential

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https://doi.org/10.1103/PhysRevResearch.2.033016

Abstract

We investigate the leading area-law contribution to entanglement entropy in a system described by a general Lagrangian with O(2) symmetry containing first- and second-order time derivatives, namely, breaking the Lorentz invariance. We establish a connection between the Higgs gap present in a symmetry-broken phase and the area-law term for the entanglement entropy in the general nonrelativistic case. Our predictions for the entanglement entropy and correlation length are successfully compared to numerical results in two paradigmatic systems: the Mott insulator to the superfluid transition for ultracold lattice bosons and the ground state of ferrimagnetic systems.

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Gravetat quàntica, Termodinàmica

Subject (English)

Quantum gravity, Thermodynamics

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Publicacions de projectes de recerca finançats per la UE

Citation

MORERA NAVARRO, Ivan, et al. Entanglement entropy in low-energy field theories at a finite chemical potential. Physical Review Research. 2020. Vol. 2, num. 3, pags. 033016. ISSN 2643-1564. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/179876

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