منابع مشابه
Polycritical Gravities
We present higher-derivative gravities that propagate an arbitrary number of gravitons of different mass on (A)dS backgrounds. These theories have multiple critical points, at which the masses degenerate and the graviton energies are non-negative. For six derivatives and higher there are critical points with positive energy.
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It is a pleasure to dedicate this little travelogue/catalogue of exotic gravity models to John Stachel, whose loyalty to the D=4 Einstein cause is too steadfast to be subverted by reading it. Once unleashed by general relativity, dynamical geometry has become a fertile playground for generalization in many directions beyond Einstein’s D=4 Ricci-flat choice. This trend has intensified with strin...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2012
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271812500423