We compute the spin-wave dispersion of the square-lattice Heisenberg antiferromagnet at T=0 within the Dyson-Maleev formalism, to order 1/S. This allows us to calculate the spin-wave velocity renormalization factor, Zc, to order O(1/S²). For the S=1/2 case, it is found that Zc=1.1765±{}0.0002, in very good agreement with series-expansion estimates.
No takes yet. Share an insight, caveat, or question.
Canali et al. (1992) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: