f(Lovelock) theories of gravity
نویسندگان
چکیده
منابع مشابه
Theories of Quantum Gravity
Ju ly 20 0 8 je a n -f ra n co is P o d ev in on the very smallest scales—the voids in between the smallest known elementary particles—by quantum laws and possibly explain it in terms of some fundamental constituents. Superstring theory is often described as the leading candidate to fill this role, but it has not yet provided an answer to any of these pressing questions. Instead, following its ...
متن کاملAlternative Theories of Gravity
ACKNOWLEDGEMENTS This work would not have been possible without the help of a lot of people. I would like to thank my family and friends for their encouragement, my collaborators David Mota and Robert Scherrer for their hard work and my office mate Simon West for innumerable delightful lunches. Most of all I would like to thank my supervisor, John Barrow, for his constant support, his guidance ...
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Quantization of two-dimensional dilaton gravity coupled to conformal matter is investigated. Working in conformal gauge about a fixed background metric, the theory may be viewed as a sigma model whose target space is parameterized by the dilaton φ and conformal factor ρ. A precise connection is given between the constraint that the theory be independent of the background metric and conformal in...
متن کاملf(R) theories of gravity
Modified gravity theories have received increased attention lately due to combined motivation coming from high-energy physics, cosmology and astrophysics. Among numerous alternatives to Einstein’s theory of gravity, theories which include higher order curvature invariants, and specifically the particular class of f(R) theories, have a long history. In the last five years there has been a new st...
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The analysis of a general multibody physical system governed by Einstein’s equations in quite difficult, even if numerical methods (on a computer) are used. Some of the difficulties – many coupled degrees of freedom, dynamic instability – are associated with the presence of gravitational waves. We have developed a number of “waveless approximation theories” (WAT) which repress the gravitational...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2016
ISSN: 1029-8479
DOI: 10.1007/jhep04(2016)028