Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Edward Wilson-Ewing"'
Publikováno v:
Universe, Vol 3, Iss 1, p 1 (2016)
We review matter bounce scenarios where the matter content is dark matter and dark energy. These cosmologies predict a nearly scale-invariant power spectrum with a slightly red tilt for scalar perturbations and a small tensor-to-scalar ratio. Importa
Externí odkaz:
https://doaj.org/article/08b2d174ddfe4919ae29b54af98607b4
Publikováno v:
Physical Review D. 106
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05067af9760c85b72c85543918883b5e
https://doi.org/10.1103/physrevd.106.066022
https://doi.org/10.1103/physrevd.106.066022
Autor:
Edward Wilson-Ewing, Marco De Cesare
In trace-free Einstein gravity, the stress-energy tensor of matter is not necessarily conserved and so the theory offers a natural framework for interacting dark energy models where dark energy has a constant equation of state $w=-1$. We derive the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82115aeb628ac4257e31c62bda69a96c
http://arxiv.org/abs/2112.12701
http://arxiv.org/abs/2112.12701
Autor:
Edward Wilson-Ewing
Publikováno v:
Foundations of Physics. 51
There are hints that the connectivity of space-time in quantum gravity could emerge from entanglement, and it has further been proposed that any two entangled particles may be connected by a quantum wormhole. One way to test this proposal is by probi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8614eb9caab43e2705f0a0ed3623cb1f
https://doi.org/10.1007/s10701-021-00489-y
https://doi.org/10.1007/s10701-021-00489-y
Publikováno v:
General Relativity and Gravitation
General Relativity and Gravitation, Springer Verlag, 2021, 53, pp.7. ⟨10.1007/s10714-020-02781-0⟩
General Relativity and Gravitation, 2021, 53 (1), pp.7. ⟨10.1007/s10714-020-02781-0⟩
General Relativity and Gravitation, Springer Verlag, 2021, 53, pp.7. ⟨10.1007/s10714-020-02781-0⟩
General Relativity and Gravitation, 2021, 53 (1), pp.7. ⟨10.1007/s10714-020-02781-0⟩
The tension between the value of the Hubble constant $H_0$ determined from local supernovae data and the one inferred from the cosmic microwave background based on the $\Lambda$CDM cosmological model may indicate the need for new physics. Here, we sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ed9a551aebd3da2da93b59d76f051ed
https://hal.archives-ouvertes.fr/hal-02470705
https://hal.archives-ouvertes.fr/hal-02470705
We study the quantum gravitational collapse of spherically symmetric pressureless dust. Using an effective equation derived from a polymer quantization in the connection-triad phase space variables of general relativity, we find numerically, for a va
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e96565811f4ebb50b7fa4e826ca9ff4e
The dynamics of the vacuum Kantowski-Sachs space-time are studied in the so-called limiting curvature mimetic gravity theory. It is shown that in this theory the vacuum Kantowski-Sachs space-time is always singular. While the departures from general
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e632ea0f69543e7a2eb28fccdaf744a9
https://hdl.handle.net/11588/914595
https://hdl.handle.net/11588/914595
We develop an effective framework for the $\bar\mu$ scheme of holonomy corrections motivated by loop quantum gravity for vacuum spherically symmetric space-times. This is done by imposing the areal gauge in the classical theory, and then expressing t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3856bdd922f8f9b630a0674c23c9d83d
We show that the constraints which follow from the {\it Trans-Planckian Censorship Conjecture} for inflationary cosmology can be strengthened if the pre-inflationary universe was dominated by radiation. The resulting upper bound on the energy scale o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbcf1876f797444234cccdb8c88e1a3f
http://arxiv.org/abs/2001.00043
http://arxiv.org/abs/2001.00043
In this addendum to [Phys. Rev. D 99 (2019) 086017], we extend the construction of a Hamiltonian formalism to a new class of group field theory actions with a kinetic term that is local in the group variables and depends only on their derivatives; su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::764605c9f4fe548dae50bc5cc326891a
https://eprints.whiterose.ac.uk/153164/1/1908.09850v1.pdf
https://eprints.whiterose.ac.uk/153164/1/1908.09850v1.pdf