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Braneworlds scenarios in a gravity model with higher order spatial three-curvature terms
(Springer, 2013-04-04)
On four-dimensional Einsteinian gravity, quasitopological gravity, cosmology and black holes
(Elsevier Science, 2020-06-10)
We show that the combination of cubic invariants defining five-dimensional quasitopological gravity, when written in four dimensions, reduce to the version of four-dimensional Einsteinian gravity recently proposed by ...
Observational constraints on a phenomenological f (R, partial derivative R)-model
(Springer, 2015-03-01)
This paper analyses the cosmological consequences of amodified theory of gravity whose action integral is built from a linear combination of the Ricci scalar R and a quadratic term in the covariant derivative of R. The ...
Higher spin analogs of linearized topologically massive gravity and linearized new massive gravity
(2021-10-15)
We suggest a new spin-4 self-dual model (parity singlet) and a new spin-4 parity doublet in D=2+1. They are of higher order in derivatives and are described by a totally symmetric rank-4 tensor without extra auxiliary ...
Higher-spin initial data in twistor space with complex stargenvalues
(Springer, 2020-06)
This paper is a supplement to and extension of arXiv:1903.01399. In the internal twistor space of the 4D Vasiliev’s higher-spin gravity, we study the star-product eigenfunctions of number operators with generic complex ...
Renormalized AdS gravity and holographic entanglement entropy of even-dimensional CFTs
(Springer Verlag, 2019-10)
We derive a general formula for renormalized entanglement entropy in even- dimensional CFTs holographically dual to Einstein gravity in one dimension higher. In order to renormalize, we adapt the Kounterterm method to ...
Higher-order Lorentz-invariance violation, quantum gravity and fine-tuning
(2015)
The issue of Lorentz fine-tuning in effective theories containing higher-order operators is studied. To this end, we focus on the Myers-Pospelov extension of QED with dimension-five operators in the photon sector and ...
Q curvature and gravity
(American Physical Society, 2018-11)
In this paper, we consider a family of n-dimensional, higher-curvature theories of gravity whose action is given by a series of dimensionally extended conformal invariants. The latter correspond to higher-order generalizations ...