Hidden topological order in integer quantum spin chains
S. M. Girvin, Daniel P. Arovas
Using an idea of Rommelse and den Nijs, we have investigated a direct analogy between the topological order in integer quantum antiferromagnets and the topological order in the fractional quantum Hall effect (FQHE). Numerical results are presented for the S = 1 generalized Heisenberg chain. The analogy between the Laughlin gap in the FQHE and the Haldane gap in integer spin chains is discussed.
Physica Scripta•Jan 1, 1989•135 citations