Academic Journal
Coarse graining theories with gauge symmetries
| العنوان: | Coarse graining theories with gauge symmetries |
|---|---|
| المؤلفون: | Bahr, B., Dittrich, B., He, S. |
| المصدر: | New Journal of Physics |
| سنة النشر: | 2011 |
| المجموعة: | Max Planck Society: MPG.PuRe |
| الوصف: | Discretizations of continuum theories often do not preserve the gauge symmetry content. This occurs in particular for diffeomorphism symmetry in general relativity, which leads to severe difficulties both in canonical and covariant quantization approaches. We discuss here the method of perfect actions, which attempts to restore gauge symmetries by mirroring exactly continuum physics on a lattice via a coarse graining process. Analytical results can only be obtained via a perturbative approach, for which we consider the first steps, namely the coarse graining of the linearized theory. The linearized gauge symmetries are exact also in the discretized theory, hence we develop a formalism to deal with gauge systems. Finally we provide a discretization of linearized gravity as well as a coarse graining map and show that with this choice the 3D linearized gravity action is invariant under coarse graining. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| Relation: | info:eu-repo/semantics/altIdentifier/arxiv/1011.3667; info:eu-repo/semantics/altIdentifier/urn/http://arxiv.org/abs/1011.3667; http://hdl.handle.net/11858/00-001M-0000-0012-D411-F; http://hdl.handle.net/11858/00-001M-0000-0012-D410-2 |
| الاتاحة: | http://hdl.handle.net/11858/00-001M-0000-0012-D411-F http://hdl.handle.net/11858/00-001M-0000-0012-D410-2 |
| Rights: | info:eu-repo/semantics/openAccess ; http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
| رقم الانضمام: | edsbas.E82341A6 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |