1k citations · 2.8k across the 17 of their papers we have counts for
17 papers
Cosmology and Fundamental Physics with the Euclid Satellite
Luca Amendola, Stephen Appleby, Anastasios Avgoustidis +69
Euclid is a European Space Agency medium class mission selected for launch in 2020 within the Cosmic Vision 2015 2025 program. The main goal of Euclid is to understand the origin o…
The traces of anisotropic dark energy in light of Planck
Wilmar Cardona, Lukas Hollenstein, Martin Kunz
We study a dark energy model with non-zero anisotropic stress, either linked to the dark energy density or to the dark matter density. We compute approximate solutions that allow t…
Cosmological Ohm's law and dynamics of non-minimal electromagnetism
Lukas Hollenstein, Rajeev Kumar Jain, Federico R. Urban
The origin of large-scale magnetic fields in cosmic structures and the intergalactic medium is still poorly understood. We explore the effects of non-minimal couplings of electroma…
Cosmology and fundamental physics with the Euclid satellite
Luca Amendola, Stephen Appleby, David Bacon +60
Euclid is a European Space Agency medium class mission selected for launch in 2019 within the Cosmic Vision 2015-2025 programme. The main goal of Euclid is to understand the origin…
Generation of helical magnetic fields from inflation
Rajeev Kumar Jain, Ruth Durrer, Lukas Hollenstein
The generation of helical magnetic fields during single field inflation due to an axial coupling of the electromagnetic field to the inflaton is discussed. We find that such a coup…
Nonlinear cosmological consistency relations and effective matter stresses
Guillermo Ballesteros, Lukas Hollenstein, Rajeev Kumar Jain +1
We propose a fully nonlinear framework to construct consistency relations for testing generic cosmological scenarios using the evolution of large scale structure. It is based on th…
Zero-point quantum fluctuations in cosmology
Lukas Hollenstein, Maud Jaccard, Michele Maggiore +1
We re-examine the classic problem of the renormalization of zero-point quantum fluctuations in a Friedmann-Robertson-Walker background. We discuss a number of issues that arise whe…
Resonant magnetic fields from inflation
Christian T. Byrnes, Lukas Hollenstein, Rajeev Kumar Jain +1
We propose a novel scenario to generate primordial magnetic fields during inflation induced by an oscillating coupling of the electromagnetic field to the inflaton. This resonant m…
Early dark energy from zero-point quantum fluctuations
Michele Maggiore, Lukas Hollenstein, Maud Jaccard +1
We examine a cosmological model with a dark energy density of the form , where is the component that accelerates the Hubble expansion at late times a…
Can slow roll inflation induce relevant helical magnetic fields?
Ruth Durrer, Lukas Hollenstein, Rajeev Kumar Jain
We study the generation of helical magnetic fields during single field inflation induced by an axial coupling of the electromagnetic field to the inflaton. During slow roll inflati…
Stability of the Einstein static universe in modified theories of gravity
Christian G. Boehmer, Lukas Hollenstein, Francisco S. N. Lobo +1
We present a brief overview of the stability analysis of the Einstein static universe in various modified theories of gravity, like f(R) gravity, Gauss-Bonnet or f(G) gravity, and…
Theoretical Priors On Modified Growth Parametrisations
Yong-Seon Song, Lukas Hollenstein, Gabriela Caldera-Cabral +1
Next generation surveys will observe the large-scale structure of the Universe with unprecedented accuracy. This will enable us to test the relationships between matter over-densit…
Constraints on early dark energy from CMB lensing and weak lensing tomography
Lukas Hollenstein, Domenico Sapone, Robert Crittenden +1
Dark energy can be studied by its influence on the expansion of the Universe as well as on the growth history of the large-scale structure. In this paper, we follow the growth of t…
Exact solutions of f(R) gravity coupled to nonlinear electrodynamics
Lukas Hollenstein, Francisco S. N. Lobo
In this work, exact solutions of static and spherically symmetric space-times are analyzed in f(R) modified theories of gravity coupled to nonlinear electrodynamics. Firstly, we re…
Challenges for creating magnetic fields by cosmic defects
Lukas Hollenstein, Chiara Caprini, Robert Crittenden +1
We analyse the possibility that topological defects can act as a source of magnetic fields through the Harrison mechanism in the radiation era. We give a detailed relativistic deri…
Stability of the Einstein static universe in f(R) gravity
Christian G. Boehmer, Lukas Hollenstein, Francisco S. N. Lobo
We analyze the stability of the Einstein static universe by considering homogeneous scalar perturbations in the context of f(R) modified theories of gravity. By considering specifi…
Dark matter distribution function from non-extensive statistical mechanics
Steen H. Hansen, Daniel Egli, Lukas Hollenstein +1
We present an analytical and numerical study of the velocity distribution function of self gravitating collisionless particles, which include dark matter and star clusters. We show…