Entanglement in composite free-fermion systems. (8th July 2015)

• Record Type: Journal Article
• Authors: Eisler, Viktor; Chung, Ming-Chiang; Peschel, Ingo
• Is Part Of: Journal of statistical mechanics. (2015:Jul.)
• Publication Date: 2015-07-08
• Subjects: 2; 2/050 -- 2/115; Statistical mechanics -- Periodicals; Mechanics -- Statistical methods -- Periodicals; 530.1305
• DOI: 10.1088/1742-5468/2015/07/P07011
• Languages: English
• ISSNs: 1742-5468

Abstract

Abstract: 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.