Using DMRG in the Hamiltonian formalism, the paper computes theta-dependent pion and sigma masses in the 2-flavor Schwinger model that agree with bosonization and show CFT-like behavior at theta=pi.
Susskind,Lattice Fermions, Phys
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Computing theta-dependent mass spectrum of the 2-flavor Schwinger model in the Hamiltonian formalism
Using DMRG in the Hamiltonian formalism, the paper computes theta-dependent pion and sigma masses in the 2-flavor Schwinger model that agree with bosonization and show CFT-like behavior at theta=pi.