TL;DR
This paper explores how anomalies can eliminate confinement in gauge theories, demonstrating that instanton effects are suppressed due to anomaly-induced mechanisms in specific models.
Contribution
It reveals that anomalies like the parity and gauge anomalies can lead to deconfinement by suppressing instanton effects in certain quantum field theories.
Findings
Anomalies can wipe out instanton effects leading to deconfinement.
Deconfinement occurs in 3D QED with fermions due to Chern-Simons term.
Similar phenomena are observed in 2D abelian chiral Higgs models.
Abstract
I discuss how instanton effects can be wiped-out due to the existence of anomalies. I first consider Compact Quantum Electrodynamics in 3 dimensions where confinement of electric charge is destroyed when fermions are added so that a Chern-Simons term is generated as a one-loop effect. I also show that a similar phenomenon occurs in the two-dimensional abelian chiral Higgs model. In both cases anomalies (parity anomaly, gauge anomaly) are responsible of the deconfinement mechanism.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Black Holes and Theoretical Physics · Quantum and Classical Electrodynamics