Effects of Heisenberg perturbation on the ground-state properties of one-dimensional extended quantum compass model. (May 2015)

• Record Type: Journal Article
• Authors: Liu, Guang-Hua; Kong, Long-Juan; Deng, Xiao-Yan; You, Wen-Long
• Is Part Of: Solid state communications. Volume 209/210(2015)
• Page Start: 5
• Page End: 10
• Publication Date: 2015-05
• Subjects: D. Exchange and superexchange -- D. Phase transitions; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2015.02.022
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: The ground-state properties and quantum phase transitions (QPTs) of the one-dimensional extended quantum compass model (EQCM) with Heisenberg perturbation are investigated by the infinite time-evolving block decimation (iTEBD) algorithm. The ground-state properties are found to be affected distinctively by the Heisenberg perturbation and rich phase diagrams are obtained. The first-order QPTs line at J 1 = 0 disappears even with an infinitesimal Heisenberg perturbation and two interesting intermediate phases, such as a disordered phase and a transverse Néel phase, are induced. Both bipartite entanglement and fidelity per site are capable of describing all the second-order QPTs. Abstract : Author-Highlights: Heisenberg perturbation affects the ground-state properties distinctively. Two intermediate phases are induced by Heisenberg perturbation. Bipartite entanglement and fidelity describe all the second-order QPTs well.