Abstract
We make extensive simulations over a spin chain model that combines the frustrated spin chain and the long-range nonfrustrated decay interactions through the variational matrix product state method for both finite and infinite lengths. We study both the ground-state entanglement and phase diagram. We find that it is most entangled in the rotation invariant long-range ordered antiferromagnetic phase, where the entanglement scales approximately logarithmically. We determine the development of the Majudar-Ghosh point to a disorder line from entanglement. And we approximately determine the transition from the dimerized and incommensurate phase of the model to a decoupled phase by studying spin correlation and the dimerization order parameter. Some implications for entanglement in systems with long-range interactions are stated.
1 More- Received 6 March 2015
- Revised 16 May 2015
DOI:https://doi.org/10.1103/PhysRevB.91.235110
©2015 American Physical Society