Topological phase diagrams of exactly solvable non-Hermitian interacting Kitaev chains

Sharareh Sayyad, Jose Lado

Research output: Contribution to journalLetterScientificpeer-review

7 Citations (Scopus)
75 Downloads (Pure)


Many-body interactions give rise to the appearance of exotic phases in Hermitian physics. Despite their importance, many-body effects remain an open problem in non-Hermitian physics due to the complexity of treating many-body interactions. Here, we present a family of exact and numerical phase diagrams for non-Hermitian interacting Kitaev chains. In particular, we establish the exact phase boundaries for the dimerized Kitaev-Hubbard chain with complex-valued Hubbard interactions. Our results reveal that some of the Hermitian phases disappear as non-Hermiticity is enhanced. Based on our analytical findings, we explore the regime of the model that goes beyond the solvable regime, revealing regimes where non-Hermitian topological degeneracy remains. The combination of our exact and numerical phase diagrams provides an extensive description of a family of non-Hermitian interacting models. Our results provide a stepping stone toward characterizing non-Hermitian topology in realistic interacting quantum many-body systems.
Original languageEnglish
Article numberL022046
Pages (from-to)1-7
Number of pages7
Issue number2
Publication statusPublished - 2 Jun 2023
MoE publication typeB1 Non-refereed journal articles


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