Abstract
Using numerical results from a density matrix renormalization group study as a guide, we develop a resonating valence bond (RVB) theory for coupled Heisenberg chains. We argue that simple topological effects mandate a short-range RVB description of systems with an even number of chains , with a spin gap, short-range correlations, and confinement of topological spin defects. Odd- systems have long-range RVB ground states, no gap, and power-law correlations.
- Received 11 March 1994
DOI:https://doi.org/10.1103/PhysRevLett.73.886
©1994 American Physical Society