47 citations · 319 across the 21 of their papers we have counts for
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quant-ph2018★ 6 cited
An entropic invariant for 2D gapped quantum phases
Kohtaro Kato, Pieter Naaijkens
We introduce an entropic quantity for two-dimensional (2D) quantum spin systems to characterize gapped quantum phases modeled by local commuting projector code Hamiltonians. The de…
math-ph2018★ 22 cited
On the stability of charges in infinite quantum spin systems
Matthew Cha, Pieter Naaijkens, Bruno Nachtergaele
We consider a theory of superselection sectors for infinite quantum spin systems, describing charges that can be approximately localized in cone-like regions. The primary examples…