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1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeSep 13th 2014
   • PermaLink
   Author: Urs
   Format: MarkdownItexnext week at a workshop titled _[Operator and geometric analysis on quantum theory](http://www.science.unitn.it/~moretti/convegno/convegno.html)_ I'll be giving a talk based on these slides here: _[[schreiber:Higher field bundles for gauge fields]]_

   next week at a workshop titled Operator and geometric analysis on quantum theory I’ll be giving a talk based on these slides here:

   Higher field bundles for gauge fields (schreiber)

2. • CommentRowNumber2.
   • CommentAuthorUrs
   • CommentTimeApr 1st 2015
   • (edited Apr 1st 2015)
   • PermaLink
   Author: Urs
   Format: MarkdownItexAt _[[field (physics)]]_ in the section _[The traditional idea of field bundles and its problems](http://ncatlab.org/nlab/show/field%20(physics)#IdeaOfFieldBundlesAndItsProblems)_ it has been pointed out that that for a gauge theory to be formulate both true to the gauge principle as well as to the locality principle, it has to refine [[local nets of observables]] from being set-valued to being groupoid valued and (co-)stacky. Nobody however had looked into this in the context of [[AQFT]]. The entry cited one article that was at least the first to realize the problem. We had then met and talked a bit, and now these authors have come out with what looks like an excellent article that does it right: * [[Marco Benini]], [[Alexander Schenkel]], [[Richard Szabo]], _Homotopy colimits and global observables in Abelian gauge theory_ ([arXiv:1503.08839](http://arxiv.org/abs/1503.08839)) I have added this pointer to the above entry as well as to a few related ones.

   At field (physics) in the section The traditional idea of field bundles and its problems it has been pointed out that that for a gauge theory to be formulate both true to the gauge principle as well as to the locality principle, it has to refine local nets of observables from being set-valued to being groupoid valued and (co-)stacky.

   Nobody however had looked into this in the context of AQFT. The entry cited one article that was at least the first to realize the problem. We had then met and talked a bit, and now these authors have come out with what looks like an excellent article that does it right:

   • Marco Benini, Alexander Schenkel, Richard Szabo, Homotopy colimits and global observables in Abelian gauge theory (arXiv:1503.08839)

   I have added this pointer to the above entry as well as to a few related ones.