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quant-ph2026
Local observable errors from truncating interaction tails in gapped quantum lattice systems
Kangle Li
We bound the error in ground-state expectations of local observables caused by truncating the spatial tails of a gapped quantum lattice Hamiltonian. We show that the error is contr…
cond-mat.str-el2026
Topological phases and quantum criticality from Chern-Simons-matter theories
Yunchao Hao, Yingcheng Li, Kangle Li +1
Motivated by recent numerical studies where various Chern-Simons-matter theories emerge, we analytically study topological phases and quantum criticality in two-dimensional…