Year: 2019
Type: article
Abstract: Thus far, all known ghost-free interactions of multiple spin-2 fields have involved at most pairwise couplings of the fields, which are direct generalizations of bimetric interactions. We present a class of spin-2 theories with genuine multifield interactions and explicitly demonstrate the absence of ghost instabilities. The construction involves integrating out a nondynamical field in a theory of spin-2 fields with only pairwise ghost-free interactions. The new multivierbein interactions generated are not always expressible in terms of the associated metrics.
Source: Physical Review Letters
Authors: S. F. Hassan, Angnis Schmidt-May
Institutions: Stockholm University, AlbaNova, Max Planck Institute for Physics
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Funders: Max-Planck-Gesellschaft, Vetenskapsrådet
OpenAlex ID: W2798566005