New Types of Off-Diagonal Long Range Order in Quantum Spin Chains
J. C. Talstra, Steven P. Strong, P. W. Anderson
We discuss new possibilities for off-diagonal long range order (ODLRO) in spin chains involving operators which add or delete sites from the chain. For the one-dimensional, periodic Heisenberg, inverse square exchange, and $\mathrm{XY}$ models we give numerical evidence for the hidden ODLRO conjectured by Anderson. A connection to the singlet pair correlations in one-dimensional models of interacting electrons is made and briefly discussed.
arXiv:cond-mat/9411074•Physical Review Letters•Jun 26, 1995•21 citations