Publications (6)
Universal Deformations
Aleksey Cherman, Theodore Jacobson, Maria Neuzil
QFTs with local topological operators feature unusual sectors called "universes," which are separated by infinite-tension domain walls. We show that such systems have relevant defo…
Symmetry theta angles and topological Witten effects
Shi Chen, Aleksey Cherman, Maria Neuzil
We introduce a large class of angles in quantum field theory that we call symmetry angles. Unlike conventional angles whose definition depends on a choice of a path…
Beta Functions of 2d Adjoint QCD
Aleksey Cherman, Maria Neuzil
We discuss the long-distance physics of 2d adjoint QCD when it is viewed as an effective field theory, and determine the beta functions for its two classically-marginal four-fermi…
1-form symmetry versus large N QCD
Aleksey Cherman, Theodore Jacobson, Maria Neuzil
We show that large N QCD does not have an emergent 1-form symmetry. Our results suggest that a symmetry-based understanding of (approximate) confinement in QCD would…
Bosonization versus the Nielsen-Ninomiya theorem
Saif Ullah Baig, Shi Chen, Aleksey Cherman +1
Thanks to bosonization, bosonic lattice models can offer a lattice regularization of chiral fermions. We construct chiral lattice fermion operators in the 2D modified Villain scala…
Cheshire terms, Aharonov-Bohm effects, and axions
Shi Chen, Aleksey Cherman, Gongjun Choi +1
We discuss unusual terms that can appear in field theories that allow global vortices. These `Cheshire terms' induce Aharonov-Bohm effects for some particles that move ar…