Null energy condition violations in bimetric gravity
Journal of High Energy Physics, ISSN: 1126-6708, Vol: 2012, Issue: 8
2012
- 47Citations
- 7Captures
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Article Description
We consider the effective stress-energy tensors for the foreground and background sectors in ghost-free bimetric gravity. By considering the symmetries of the theory, we show that the foreground and background null energy conditions (NECs) are strongly anti-correlated. In particular, the NECs can only be simultaneously fulfilled when they saturate, corresponding to foreground and background cosmological constants. In all other situations, either the foreground or the background is subject to a NEC-violating contribution to the total stress-energy. © SISSA 2012.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84865783185&origin=inward; http://dx.doi.org/10.1007/jhep08(2012)148; http://link.springer.com/10.1007/JHEP08(2012)148; http://link.springer.com/content/pdf/10.1007/JHEP08(2012)148; http://link.springer.com/content/pdf/10.1007/JHEP08(2012)148.pdf; http://link.springer.com/article/10.1007/JHEP08(2012)148/fulltext.html; http://dx.doi.org/10.1007/jhep08%282012%29148; https://dx.doi.org/10.1007/jhep08%282012%29148; https://link.springer.com/article/10.1007%2FJHEP08%282012%29148
Springer Nature
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