De Sitter Galileon

Burrage, Clare; Rham, Claudia de; Heisenberg, Lavinia

doi:10.1088/1475-7516/2011/05/025

Cited by 95 publications

(79 citation statements)

References 76 publications

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“…Galileon theory arises as a special case of this setup. Similar generalization of Galileon field to maximally symmetric spacetime using a deSitter slicing has also been done in [12].…”

Section: Introductionmentioning

confidence: 90%

DBI Galileon and late time acceleration of the universe

Sampurnanand

Sen

2012

J. Cosmol. Astropart. Phys.

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Abstract. We consider 1 + 3 dimensional maximally symmetric Minkowski brane embedded in a 1 + 4 dimensional maximally symmetric Minkowski background. The resulting 1 + 3 dimensional effective field theory is of DBI (Dirac-Born-Infeld) Galileon type. We use this model to study the late time acceleration of the universe. We study the deviation of the model from the concordance ΛCDM behaviour. Finally we put constraints on the model parameters using various observational data.

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“…Galileon theory arises as a special case of this setup. Similar generalization of Galileon field to maximally symmetric spacetime using a deSitter slicing has also been done in [12].…”

Section: Introductionmentioning

confidence: 90%

DBI Galileon and late time acceleration of the universe

Sampurnanand

Sen

2012

J. Cosmol. Astropart. Phys.

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“…This theory has been extensively studied in many contexts including inflation [142,440,443] and late time acceleration. The DBI theory arises naturally as the world volume theory of a brane probing a higher-dimensional space and therefore inherits the isometries of the target space as global symmetries [484][485][486][487].…”

Section: Generalizationsmentioning

confidence: 99%

“…By considering a 3-brane probing a non-dynamical bulk, the actions for galileons, conformal galileons and covariant galileons appear as the non-relativistic limit of world-volume and bulk Lovelock invariants [584]. This probe brane construction has been greatly generalized-it has been applied to all cases of maximally symmetric branes probing maximally symmetric bulks [485][486][487], to higher codimensions [570,574] and to cosmological backgrounds [585], each leading to novel scalar theories. See [258] for a review of these extensions.…”

Section: The Vainshtein Mechanism: Galileonsmentioning

confidence: 99%

Beyond the cosmological standard model

et al. 2015

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After a decade and a half of research motivated by the accelerating universe, theory and experiment have a reached a certain level of maturity. The development of theoretical models beyond Λ or smooth dark energy, often called modified gravity, has led to broader insights into a path forward, and a host of observational and experimental tests have been developed. In this review we present the current state of the field and describe a framework for anticipating developments in the next decade. We identify the guiding principles for rigorous and consistent modifications of the standard model, and discuss the prospects for empirical tests.We begin by reviewing recent attempts to consistently modify Einstein gravity in the infrared, focusing on the notion that additional degrees of freedom introduced by the modification must "screen" themselves from local tests of gravity. We categorize screening mechanisms into three broad classes: mechanisms which become active in regions of high Newtonian potential, those in which first derivatives of the field become important, and those for which second derivatives of the field are important. Examples of the first class, such as f (R) gravity, employ the familiar chameleon or symmetron mechanisms, whereas examples of the last class are galileon and massive gravity theories, employing the Vainshtein mechanism. In each case, we describe the theories as effective theories and discuss prospects for completion in a more fundamental theory. We describe experimental tests of each class of theories, summarizing laboratory and solar system tests and describing in some detail astrophysical and cosmological tests. Finally, we discuss prospects for future tests which will be sensitive to different signatures of new physics in the gravitational sector.The review is structured so that those parts that are more relevant to theorists vs. observers/experimentalists are clearly indicated, in the hope that this will serve as a useful reference for both audiences, as well as helping those interested in bridging the gap between them.

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“…Galileons appear in the non-relativistic limit of theories describing fluctuating hypersurfaces [7][8][9][10], which is of interest in high energy physics, but may also be of interest for biophysics or condensed matter applications. The galileons and their higher-shift analogues may also be useful for describing Goldstone bosons near multi-critical points [11][12][13].…”

mentioning

confidence: 99%