Numerical study of ground state and low lying excitations of quantum antiferromagnets

Nandini Trevedi, D. M. Ceperley

Research output: Contribution to journalArticlepeer-review


We have studied via Green Function Monte Carlo (GFMC) the S= 1 2 Heisenberg quantum antiferromagnet in two dimensions on a square lattice. We obtain the ground state energy with only statistical errors E0/J = -0.6692(2), the staggered magnetization m†=0.31(2), and from the long wave length behavior of the structure factor, the spin wave velocity c/cO=1.14(5). We also show that the ground state wave function has long range pair correlations arising from the zero point motion of spin waves.

Original languageEnglish (US)
Pages (from-to)1455-1456
Number of pages2
JournalPhysica C: Superconductivity and its applications
Issue numberPART 2
StatePublished - Dec 1989

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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