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pro vyhledávání: '"Kutluk, Emine Seyma"'
The linear solution for quadrupolar perturbations around de Sitter spacetime was recently constructed. In this paper, we provide the flux-balance laws for each background symmetry (dilatations, rotations, spatial translations and cosmological boosts)
Externí odkaz:
http://arxiv.org/abs/2411.16215
We obtain the closed form expression for the metric perturbation around de Sitter spacetime generated by a matter source below Hubble scale both in generalized harmonic gauge and in Bondi gauge up to quadrupolar order in the multipolar expansion, inc
Externí odkaz:
http://arxiv.org/abs/2309.02081
Autor:
Kutluk, Emine Şeyma
Using the tool of Hodge-Morrey decomposition of forms, we prove a new decomposition of symmetric rank-2 tensors on Ricci flat manifolds with boundary. Using this we reconstruct a new cosmological perturbation theory that allows for the scalar-vector-
Externí odkaz:
http://arxiv.org/abs/2306.04211
Adiabatic Solutions in General Relativity as Null Geodesics on the Space of Boundary Diffeomorphisms
Autor:
Kutluk, Emine Şeyma
We use a trick similar to Weinberg's for adiabatic modes, in a Manton approximation for general relativity on manifolds with spatial boundary. This results in a description of the slow-time dependent solutions as null geodesics on the space of bounda
Externí odkaz:
http://arxiv.org/abs/2201.01986
In arXiv:1904.12869 it was shown how in an adiabatic limit the vacuum Einstein equations on a compact spatial region can be re-expressed as geodesic equations on the group of diffeomorphisms of the boundary. This is reminiscent of the program initiat
Externí odkaz:
http://arxiv.org/abs/2106.13268
Publikováno v:
J. High Energ. Phys. 2021, 89 (2021)
We consider Yang--Mills theory with a compact structure group $G$ on four-dimensional de Sitter space dS$_4$. Using conformal invariance, we transform the theory from dS$_4$ to the finite cylinder ${\cal I}\times S^3$, where ${\cal I}=(-\pi/2, \pi/2)
Externí odkaz:
http://arxiv.org/abs/2104.02075
Autor:
Kutluk, Emine Şeyma
We investigate adiabatic solutions to general relativity for a spacetime with spatial slices with boundary, by Manton approximation. This approximation tells us for a theory with a Lagrangian in the natural form, a motion that is described as a slow
Externí odkaz:
http://arxiv.org/abs/2103.11328
We consider General Relativity (GR) on a space-time whose spatial slices are compact manifolds $M$ with non-empty boundary $\partial M$. We argue that this theory has a non-trivial space of `vacua', consisting of spatial metrics obtained by an action
Externí odkaz:
http://arxiv.org/abs/1904.12869
Akademický článek
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Autor:
Kaya, Ali, Kutluk, Emine Seyma
Publikováno v:
Phys. Rev. D 92, 123505 (2015)
We express the in-in functional determinant giving the one-loop effective potential for a scalar field propagating in a cosmological spacetime in terms of the mode functions specifying the vacuum of the theory and then apply adiabatic regularization
Externí odkaz:
http://arxiv.org/abs/1509.00489