Results 61 to 70 of about 591,643 (217)
Chiral gravity, log gravity, and extremal CFT [PDF]
Physical Review D, 2010 We show that the linearization of all exact solutions of classical chiral gravity around the AdS3 vacuum have positive energy. Non-chiral and negative-energy solutions of the linearized equations are infrared divergent at second order, and so are removed from the spectrum.
Maloney, Alexander +2 more
openaire +4 more sources
Effective action for non-geometric fluxes duality covariant actions
Journal of High Energy Physics, 2017 The (heterotic) double field theories and the exceptional field theories are manifestly duality covariant formulations, describing low-energy limit of various super-string and M-theory compactifications.
Kanghoon Lee +2 more
doaj +1 more source
Flavour-kinematics duality for Goldstone modes
Journal of High Energy Physics, 2022 Three scalar effective field theories have special properties in terms of non-linear symmetries, soft limits and on-shell constructability that arise from their Goldstone nature: the non-linear σ-model, multi-DBI theory and the special Galileon.
Dijs de Neeling +2 more
doaj +1 more source
The emergence of spacetime, or, quantum gravity on your desktop [PDF]
, 2008 Is there an approach to quantum gravity which is conceptually simple, relies on very few fundamental physical principles and ingredients, emphasizes geometric (as opposed to algebraic) properties, comes with a definite numerical approximation scheme, and
Dep Natuurkunde +2 more
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The philosophy behind quantum gravity [PDF]
, 2006 This paper investigates some of the philosophical and conceptual issues raised by the search for a quantum theory of gravity. It is critically discussed whether such a theory is necessary in the first place, and how much would be accomplished if it is ...
Zinkernagel, Henrik +2 more
core +1 more source
2D transverse laser cooling of a hexapole focused beam of cold BaF molecules
Communications PhysicsLaser cooling of molecules is a powerful technique for producing cold, slow beams for precision measurements and quantum control, yet its implementation remains challenging due to molecular complexity.
J. W. F. van Hofslot +21 more
doaj +1 more source
Quantum astrometric observables II: time delay in linearized quantum gravity [PDF]
, 2013 A clock synchronization thought experiment is modeled by a diffeomorphism invariant "time delay" observable. In a sense, this observable probes the causal structure of the ambient Lorentzian spacetime. Thus, upon quantization, it is sensitive to the long
Sub String Theory Cosmology and ElemPart +8 more
core +2 more sources
Symmetry breaking patterns for inflation
Journal of High Energy Physics, 2018 We study inflationary models where the kinetic sector of the theory has a non-linearly realised symmetry which is broken by the inflationary potential. We distinguish between kinetic symmetries which non-linearly realise an internal or space-time group ...
Remko Klein +2 more
doaj +1 more source
, 2012 Philosophers of physics and physicists have long been intrigued by the analogies and disanalogies between gravitational theories and (Yang-Mills-type) gauge theories.
Teh, Nicholas
core
Spacetime and the Philosophical Challenge of Quantum Gravity [PDF]
, 2001 We survey some philosophical aspects of the search for a quantum theory of gravity, emphasising how quantum gravity throws into doubt the treatment of spacetime common to the two `ingredient theories' (quantum theory and general relativity), as a 4 ...
Butterfield, Jeremy +3 more
core +1 more source