Quantum Monte Carlo simulations locate a continuous boundary phase transition at Q_c=0.310(11) from AF to VBS order in a quantum critical Heisenberg model with dangling chain, yielding exponents y_s=0.81(4), Δ_s=0.660(15), Δ_v=0.204(14).
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Numerical evidence shows multiple Rényi defect universality classes at O(3) quantum critical points depending on entanglement cut type, with a possible phase transition on the defect for extraordinary cuts as the Rényi index varies.
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Deconfined Boundary Phase Transition of a Quantum Critical Heisenberg Model
Quantum Monte Carlo simulations locate a continuous boundary phase transition at Q_c=0.310(11) from AF to VBS order in a quantum critical Heisenberg model with dangling chain, yielding exponents y_s=0.81(4), Δ_s=0.660(15), Δ_v=0.204(14).
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Criticality on R\'enyi defects at (2+1)$d$ O(3) quantum critical points
Numerical evidence shows multiple Rényi defect universality classes at O(3) quantum critical points depending on entanglement cut type, with a possible phase transition on the defect for extraordinary cuts as the Rényi index varies.