Improved scaling of the entanglement entropy of quantum antiferromagnetic Heisenberg systems

Abstract

In this paper, we derive corrections to the subleading logarithmic term of the entanglement entropy in systems with spontaneous broken continuous symmetry. Using quantum Monte Carlo simulations, we show that the improved scaling formula leads to much better estimations of the number of Goldstone modes in the two-dimensional square lattice spin-1/2 Heisenberg model and bilayer spin-1/2 Heisenberg model in systems of rather small sizes, compared with previous results. In addition, the universal geometry-dependent finite constant in the entanglement entropy scaling is also obtained in good agreement with the theoretical value.

10 pages, 7 figures

References in corpus (4)

• Entanglement Entropy of the Two-Dimensional Heisenberg Antiferromagnet
• Entanglement entropy scaling in the bilayer Heisenberg spin system
• Measuring Rényi entanglement entropy with high efficiency and precision in quantum Monte Carlo simulations
• Entanglement entropy from non-equilibrium Monte Carlo simulations

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