Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Christian Ecker"'
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 61 (2024)
A considerable effort has been dedicated recently to the construction of generic equations of state (EOSs) for matter in neutron stars. The advantage of these approaches is that they can provide model-independent information on the interior structure
Externí odkaz:
https://doaj.org/article/edc6da42417d439996b2c0cbe46f8151
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 3, Pp 1-17 (2022)
Abstract Holography has provided valuable insights into the time evolution of strongly coupled gauge theories in a fixed spacetime. However, this framework is insufficient if this spacetime is dynamical. We present a scheme to evolve a four-dimension
Externí odkaz:
https://doaj.org/article/2a6b1e3803da4ab390f28fb495e7064e
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-46 (2021)
Abstract We use holography to study the dynamics of a strongly-coupled gauge theory in four-dimensional de Sitter space with Hubble rate H. The gauge theory is non-conformal with a characteristic mass scale M. We solve Einstein’s equations numerica
Externí odkaz:
https://doaj.org/article/2b1e5abe564249b6bfa990abd66a9422
Publikováno v:
The Astrophysical Journal, Vol 949, Iss 1, p 11 (2023)
We have investigated the systematic differences introduced when performing a Bayesian-inference analysis of the equation of state (EOS) of neutron stars employing either variable- or constant-likelihood functions. The former has the advantage of reta
Externí odkaz:
https://doaj.org/article/0e4c04d2870445cc96a53cefa03d1db0
Publikováno v:
Physical Review X, Vol 12, Iss 4, p 041012 (2022)
We present a novel framework for the equation of state of dense and hot quantum chromodynamics (QCD), which focuses on the region of the phase diagram relevant for neutron star mergers and core-collapse supernovae. The model combines predictions from
Externí odkaz:
https://doaj.org/article/9cb9a8a72ac842f18670f83efdea1b47
Autor:
Eemeli Annala, Christian Ecker, Carlos Hoyos, Niko Jokela, David Rodríguez Fernández, Aleksi Vuorinen
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 12, Pp 1-38 (2018)
Abstract We investigate a simple holographic model for cold and dense deconfined QCD matter consisting of three quark flavors. Varying the single free parameter of the model and utilizing a Chiral Effective Theory equation of state (EoS) for nuclear
Externí odkaz:
https://doaj.org/article/83c295a250b34d43b0a348f551b151ce
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 8, Pp 1-18 (2018)
Abstract We extend our previous study of a toy model for coupling classical Yang-Mills equations for describing overoccupied gluons at the saturation scale with a strongly coupled infrared sector modeled by AdS/CFT. Including propagating modes in the
Externí odkaz:
https://doaj.org/article/aa60b7e654da4c9d85e7fa933a56675c
Publikováno v:
SciPost Physics, Vol 11, Iss 3, p 047 (2021)
We present the first holographic simulations of non-equilibrium steady state formation in strongly coupled $\mathcal{N}=4$ SYM theory in 3+1 dimensions. We initially join together two thermal baths at different temperatures and chemical potentials
Externí odkaz:
https://doaj.org/article/317a2aec939a4184a010bd05210d5367
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 11, Pp 1-34 (2017)
Abstract According to common lore, Equations of State of field theories with gravity duals tend to be soft, with speeds of sound either below or around the conformal value of υs=1/3 $$ {\upupsilon}_s=1/\sqrt{3} $$. This has important consequences in
Externí odkaz:
https://doaj.org/article/38035a6f3a50457db77423bdeeb735a0
Autor:
Christian Ecker, Daniel Grumiller, Wilke van der Schee, Shahin Sheikh-Jabbari, Philipp Stanzer
Publikováno v:
SciPost Physics, Vol 6, Iss 3, p 036 (2019)
We consider the Quantum Null Energy Condition (QNEC) for holographic conformal field theories in two spacetime dimensions (CFT$_2$). We show that QNEC saturates for all states dual to vacuum solutions of AdS$_3$ Einstein gravity, including systems
Externí odkaz:
https://doaj.org/article/31830b1a30c3470a95d59c8829ded6c1