Entanglement in composite free-fermion systems

被引：6
|
作者：
Eisler, Viktor [1 ]
Chung, Ming-Chiang [2 ]
Peschel, Ingo [3 ]
机构：
[1] Eotvos Lorand Univ, MTA ELTE Theoret Phys Res Grp, H-1117 Budapest, Hungary
[2] Natl Chung Hsing Univ, Dept Phys, Taichung 40227, Taiwan
[3] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany
来源：
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT | 2015年
关键词：
conformal field theory (theory); entanglement in extended quantum systems (theory); ISING QUANTUM CHAIN; CONFORMAL-INVARIANCE; INTERFACE DEFECTS; POLYACETYLENE; ENTROPY; XY;
D O I：
10.1088/1742-5468/2015/07/P07011
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
We consider fermionic chains where the two halves are either metals with different bandwidths or a metal and an insulator. Both are coupled together by a special bond. We study the ground-state entanglement entropy between the two pieces, its dependence on the parameters and its asymptotic form. We also discuss the features of the entanglement Hamiltonians in both subsystems and the evolution of the entanglement entropy after joining the two parts of the system.
引用
收藏
页数：18
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