Hidden chiral symmetries in BDI multichannel Kitaev chains

Autor(es)

Manesco, Antonio L. R. ^[1] ; Weber, Gabriel ^[1] ; Rodrigues, Jr., Durval ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo Lorena, Lorena Engn Sch, Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 30, n. 17 MAY 2 2018.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 16/10167-8 - Investigação de propriedades eletrônicas e topológicas de heterojunções supercondutor-grafeno para aplicações em dispositivos de computação quântica
• Beneficiário: Antonio Lucas Rigotti Manesco
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto