We consider RVB state as a variational estimate for the ground state of Heisenberg antiferromagnet in square lattice. We present numerical calculation of energy, spin-spin correlation function and spin excitation spectrum. We show, that the quantum flactuations reduce of magnetization respect to Neel order. Our results are in good agreement with other methods such as spin-wave calculation and series expansions.
Nourbakhsh, Z., Shahbazi, F. & Jafari, S. (2019). Optimized resonating valence bond state in square lattice: correlations & excitations. Iranian Journal of Physics Research, 9(2), 131–136.
MLA
Nourbakhsh, Z., Shahbazi, F., & Jafari, S. "Optimized resonating valence bond state in square lattice: correlations & excitations", Iranian Journal of Physics Research, 9, 2, 2019, 131–136.
HARVARD
Nourbakhsh, Z., Shahbazi, F., & Jafari, S. (2019). 'Optimized resonating valence bond state in square lattice: correlations & excitations', Iranian Journal of Physics Research, 9(2), pp. 131–136.
CHICAGO
Nourbakhsh, Z., Shahbazi, F. & Jafari, S., "Optimized resonating valence bond state in square lattice: correlations & excitations." Iranian Journal of Physics Research, 9 2 (2019): 131–136,
VANCOUVER
Nourbakhsh Z., Shahbazi F., Jafari S. Optimized resonating valence bond state in square lattice: correlations & excitations. Iranian Journal of Physics Research. 2019;9(2):131–136 (In Persian).
