No-Go Result for Implementing Chiral Symmetries by Locality-Preserving Unitaries

Explore a theoretical physics lecture examining the limitations of implementing chiral symmetries in fermionic lattice models. Delve into the argument that the chiral U(1)A symmetry of a Weyl fermion cannot be implemented by shallow depth quantum circuit operations in finite-dimensional onsite Hilbert spaces. Investigate the extension of this result to discrete Z_2N subgroups of U(1)_A, focusing on the constraints for N_f Weyl fermions of the same helicity. Gain insights into the intersection of topology, quantum error correction, and quantum gravity through this advanced presentation from the Institute for Pure & Applied Mathematics workshop.