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Spin-Orbital Entanglement and Phase Diagram of Spin-orbital Chain with $SU(2) imes SU(2)$ Symmetry | | Yan Chen
; Z. D. Wang
; Y. Q. Li
; F. C. Zhang
; | | Date: |
7 Jun 2006 | | Subject: | Strongly Correlated Electrons | | Abstract: | Spin-orbital entanglement in quantum spin-orbital systems is quantified by a reduced von Neumann entropy, and is calculated for the ground state of a coupled spin-orbital chain with $SU(2) imes SU(2)$ symmetry. By analyzing the discontinuity and local extreme of the reduced entropy as functions of the model parameters, we deduce a rich phase diagram to describe the quantum phase transitions in the model. Our approach provides an efficient and powerful method to identify phase boundaries in a system with complex correlation between multiply degrees of freedom. | | Source: | arXiv, cond-mat/0606194 | | Services: | Forum | Review | PDF | Favorites | |
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