4 papers · 1 filter
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…
Does hot QCD have a conformal manifold in the chiral limit?
Shi Chen, Aleksey Cherman, Robert D. Pisarski
Recent lattice evidence suggests the chiral phase transition in QCD is second-order for massless flavors. We constrain CFT descriptions of a critical line in temperatur…
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 int…
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 arou…