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20112026
most citedAbsence of topological insulator phases in non-Hermitian PT-symmetric Hamiltonians

263 citations · 354 across the 19 of their papers we have counts for

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math-ph2026

Euler Topological Metals in 1D

Yichen Hu, Jacob Shapiro

We give a rigorous one-dimensional formulation of Kane's transport proposal for probing the Euler characteristic of a Fermi sea. For a clean, translation-invariant continuum Hamilt…

math-ph2023

Homotopy Classification of loops of Clifford unitaries

Roman Geiko, Yichen Hu

Clifford quantum circuits are elementary invertible transformations of quantum systems that map Pauli operators to Pauli operators. We study periodic one-parameter families of Clif…