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• W1997029559 abstract "We compute the von Neumann and generalized R'enyi entanglement entropies in the ground-state of the spin-$1/2$ antiferromagnetic Heisenberg model on the square lattice using the modified spin-wave theory for finite lattices. The addition of a staggered magnetic field to regularize the zero modes associated with symmetry breaking is shown to be essential for obtaining well-behaved values for the entanglement entropy. The von Neumann and R'enyi entropies obey an area law with additive logarithmic corrections, and are in good quantitative agreement with numerical results from valence bond quantum Monte Carlo and density matrix renormalization group calculations. We also compute the spin fluctuations and observe a multiplicative logarithmic correction to the area law in excellent agreement with quantum Monte Carlo calculations." @default.
• W1997029559 created "2016-06-24" @default.
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• W1997029559 date "2011-06-21" @default.
• W1997029559 modified "2023-10-04" @default.
• W1997029559 title "Entanglement entropy of the two-dimensional Heisenberg antiferromagnet" @default.
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• W1997029559 doi "https://doi.org/10.1103/physrevb.83.224410" @default.
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