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- W2018442093 abstract "We consider a resonating-valence-bond state as a trial wave function for the ground state of the antiferromagnetic Heisenberg model on the square lattice. The energy and the staggered spin-spin correlation functions are calculated on a small lattice and are compared with the results of the exact diagonalization of Oitmaa and Betts. The trial energy is only about 4.7% different from the exact ground-state energy on a 4ifmmodetimeselsetexttimesfi{}4 lattice. The importance of the singlet pairs between the next-nearest antiferromagnetic sites is inferred. An argument against the previous interpretation of the numerical data as being evidence of long-range order is presented." @default.
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- W2018442093 title "Resonating-valence-bond state: Comments on the antiferromagnetic ordering of the two-dimensional Heisenberg model" @default.
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- W2018442093 doi "https://doi.org/10.1103/physrevb.37.3812" @default.
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