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Interactions of Multiple Spin-2 Fields beyond Pairwise Couplings
Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 22019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 122, no 25, article id 251101Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2019. Vol. 122, no 25, article id 251101
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-170844DOI: 10.1103/PhysRevLett.122.251101ISI: 000473035400003OAI: oai:DiVA.org:su-170844DiVA, id: diva2:1339195
Available from: 2019-07-26 Created: 2019-07-26 Last updated: 2019-07-26Bibliographically approved

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