550 citations · 1.8k across the 26 of their papers we have counts for
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Delicate topology protected by rotation symmetry: Crystalline Hopf insulators and beyond
Aleksandra Nelson, Titus Neupert, A. Alexandradinata +1
Pontrjagin's seminal topological classification of two-band Hamiltonians in three momentum dimensions is hereby enriched with the inclusion of a crystallographic rotational symmetr…
Simulating hyperbolic space on a circuit board
Patrick M. Lenggenhager, Alexander Stegmaier, Lavi K. Upreti +12
The Laplace operator encodes the behavior of physical systems at vastly different scales, describing heat flow, fluids, as well as electric, gravitational, and quantum fields. A ke…
Universal higher-order bulk-boundary correspondence of triple nodal points
Patrick M. Lenggenhager, Xiaoxiong Liu, Titus Neupert +1
Triple nodal points are degeneracies of energy bands in momentum space at which three Hamiltonian eigenstates coalesce at a single eigenenergy. For spinless particles, the stabilit…