Results 21 to 30 of about 34,436 (198)
Study of the Inflationary Spectrum in the Presence of Quantum Gravity Corrections
Universe, 2023 After a brief review of the different approaches to predicting the possible quantum gravity corrections to quantum field theory, we discuss in some detail the formulation based on a Gaussian reference frame fixing.
Giulia Maniccia +2 more
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Quantization of the Gravitational Field in the Expanding Universe [PDF]
Progress of Theoretical Physics, 1963 An attempt is made to quantize, in the linear approximation, the gravitational field in the expanding universe, from the standpoint of canonical formalism. By using a transformation function and decomposing suitably the field operator into positive and negative frequency parts, explicit forms of the four- dimensional commutation function and the ...
Nariai, H., Kimura, T.
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Fundamental length scale and the bending of light in a gravitational field
European Physical Journal C: Particles and Fields, 2022 The canonical approach to quantizing quantum gravity is understood to suffer from pathological non-renomalizability. Nevertheless in the context of effective field theory, a viable perturbative approach to calculating elementary processes is possible ...
Philip Tee, Nosratollah Jafari
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Lie algebroids and the geometry of off-shell BRST
Nuclear Physics B, 2021 It is well-known that principal bundles and associated bundles underlie the geometric structure of classical gauge field theories. In this paper, we explore the reformulation of gauge theories in terms of Lie algebroids and their associated bundles. This
Luca Ciambelli, Robert G. Leigh
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SciPost Physics, 2018 We initiate a systematic study of `t Hooft anomalies in Galilean field theories, focusing on two questions therein. In the first, we consider the non-relativistic theories obtained from a discrete light-cone quantization (DLCQ) of a relativistic ...
Kristan Jensen
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Gravitational path integral from the T 2 deformation
Journal of High Energy Physics, 2020 We study a T 2 deformation of large N conformal field theories, a higher dimensional generalization of the T T ¯ $$ T\overline{T} $$ deformation. The deformed partition function satisfies a flow equation of the diffusion type.
Alexandre Belin +2 more
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Discreteness of space from GUP in a weak gravitational field
Physics Letters B, 2016 Quantum gravity effects modify the Heisenberg's uncertainty principle to a generalized uncertainty principle (GUP). Earlier work showed that the GUP-induced corrections to the Schrödinger equation, when applied to a non-relativistic particle in a one ...
Soumen Deb, Saurya Das, Elias C. Vagenas
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Atomic state interferometry for complex vector light. [PDF]
NanophotonicsAbstract Features of complex vector light become important in any interference effects, including scattering, diffraction, and nonlinear processes. Here, we are investigating the role of polarization‐structured light in atomic state interferometers.
Samanta K +3 more
europepmc +2 more sources
Journal of High Energy Physics, 2022 Celestial holography proposes a duality between gravitational scattering in asymptotically flat space-time and a conformal field theory living on the celestial sphere.
Sabrina Pasterski, Herman Verlinde
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Inflationary scalar spectrum in loop quantum cosmology [PDF]
, 2007 In the context of loop quantum cosmology, we consider an inflationary era driven by a canonical scalar field and occurring in the semiclassical regime, where spacetime is a continuum but quantum gravitational effects are important. The spectral amplitude
Ashtekar A +45 more
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