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        物理科學與技術學院學術報告:Quantum entanglement and correlation in 1D spin chain with anisotropy power-law interactions

        報告題目:Quantum entanglement and correlation in 1D spin chain with anisotropy power-law interactions

        報告人:任杰 副教授 (常熟理工學院)

        報告時間:2019710(星期三) 9:30

        報告地點:物理科技樓343

        報告邀請人:董裕力

        報告摘要:We consider the power-law-decaying spin-1/2 XXZ chain with isotropic ferromagnetic interactions for the xy spin components and ferro- or antiferromagnetic interactions for the z spin components. Effects of the long-range interactions on the nonlocal correlations, entanglement entropy and fidelity using the techniques of density matrix renormalization group are investigated, and their relations with the quantum phase transitions are also analyzed separately. The appearance of long-range interactions not only changes the phase boundaries of the counterparts with short-range interactions, but also leads to the emergence of extoic phases. The long-range interactions in z axis induces a Winger-crystal (WC) phase, while long-range interactions in x-y axis lead to a continuous symmetry breaking (CSB) phase. The ground-state phase diagrams are determined separately.

         


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