Demonstrates 't Hooft anomaly under Z2 gauging of O(3) NLSM for Θ = π mod 2π, implying the RP2 sigma model does not exist and relating to spin-chain crystal momenta.
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SU(2) gauge theory plus DMFT with long-wavelength magnetic fluctuations produces damping asymmetry in chargon hole pockets that forms Fermi arcs in the underdoped regime.
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Nonlinear sigma models, antiperiodic boundary conditions, spin chains, and 't Hooft anomalies
Demonstrates 't Hooft anomaly under Z2 gauging of O(3) NLSM for Θ = π mod 2π, implying the RP2 sigma model does not exist and relating to spin-chain crystal momenta.
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The pseudogap in high-$T_c$ superconductors from SU(2) gauge symmetry and dynamic correlation effects
SU(2) gauge theory plus DMFT with long-wavelength magnetic fluctuations produces damping asymmetry in chargon hole pockets that forms Fermi arcs in the underdoped regime.