Hidden chiral symmetries in BDI multichannel Kitaev chains

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Author(s):	Manesco, Antonio L. R. ^[1] ; Weber, Gabriel ^[1] ; Rodrigues, Jr., Durval ^[1] Total Authors: 3
Affiliation:	^[1] Univ Sao Paulo Lorena, Lorena Engn Sch, Lorena, SP - Brazil Total Affiliations: 1
Document type:	Journal article
Source:	JOURNAL OF PHYSICS-CONDENSED MATTER; v. 30, n. 17 MAY 2 2018.
Web of Science Citations:	1
Abstract
Realistic implementations of the Kitaev chain require, in general, the introduction of extra internal degrees of freedom. In the present work, we discuss the presence of hidden BDI symmetries for free Hamiltonians describing systems with an arbitrary number of internal degrees of freedom. We generalize results of a spinfull Kitaev chain to construct a Hamiltonian with n internal degrees of freedom and obtain the corresponding hidden chiral symmetry. As an explicit application of this generalized result, we exploit by analytical and numerical calculations the case of a spinful two-band Kitaev chain, which can host up to four Majorana bound states. We also observe the appearence of minigap states, when chiral symmetry is broken. (AU)

FAPESP's process:	16/10167-8 - Investigation of electronic and topological properties of superconductor-graphene heterojunctions for applications in quantum computation devices
Grantee:	Antonio Lucas Rigotti Manesco
Support Opportunities:	Scholarships in Brazil - Doctorate (Direct)