Lattice chiral symmetry from bosons in 3+1d
The authors present an exactly solvable lattice model using bosons to realize an exact lattice chiral U(1)V x U(1)A symmetry, bypassing no-go theorems for fermions. They show how a lattice axial symmetry transmutes into a higher-form symmetry in the continuum limit and match the resulting chiral anomaly with a gauge field, providing a bosonic building block.