A unified geometric framework for boundary charges and dressings: non-Abelian theory and matter

Understand

Boundaries in gauge theories are a delicate issue.

• Arbitrary boundary choices enter the calculation of charges via Noether's second theorem, obstructing the assignment of unambiguous physical charges to local gauge symmetries.
• Replacing the arbitrary boundary choice with new degrees of freedom suggests itself.
• But, concretely, such boundary degrees of freedom are spurious---i.e.