Topological Band Theory for Non-Hermitian Hamiltonians.
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DOI: 10.1103/physrevlett.120.146402
Abstract: We develop the topological band theory for systems described by non-Hermitian Hamiltonians, whose energy spectra are generally complex. After generalizing the notion of gapped band structures to the non-Hermitian case, we classify "gapped" bands in… read more here.
Keywords: band theory; hermitian hamiltonians; topological band; band ... See more keywords