Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- The University of TokyoJP1.8k papers
- University of TsukubaJP1.7k papers
- The Ohio State UniversityUS1.7k papers
- University of MichiganUS1.6k papers
- University of GenevaCH1.6k papers
- Yale UniversityUS1.6k papers
- University of ChicagoUS1.6k papers
- Centre National de la Recherche ScientifiqueFR1.6k papers
- Lawrence Berkeley National LaboratoryUS1.6k papers
- Argonne National LaboratoryUS1.6k papers
- University of BolognaIT1.6k papers
- University of New MexicoUS1.6k papers
11 papers · 2 filters
ECO-spotting: looking for extremely compact objects with bosonic fields
Vitor Cardoso, Caio F. B. Macedo, Kei-ichi Maeda +1
Black holes are thought to describe the geometry of massive, dark compact objects in the universe. To further support and quantify this long-held belief requires knowledge of possi…
Linear growth of structure in projected massive gravity
Yusuke Manita, Rampei Kimura
In the present paper, we investigate the linear growth of matter fluctuations based on a concrete model of the projected massive gravity, which is free of the Boulware-Deser ghost…
Primordial black hole formation from massless scalar isocurvature
Chul-Moon Yoo, Tomohiro Harada, Shin'ichi Hirano +2
We numerically study the primordial black hole (PBH) formation by an isocurvature perturbation of a massless scalar field on super Hubble scales in the radiation-dominated universe…
Relativistic star perturbations in Horndeski theories with a gauge-ready formulation
Ryotaro Kase, Shinji Tsujikawa
We present a general framework for studying the relativistic star perturbations on a static and spherically symmetric background in full Horndeski theories. We take a perfect fluid…
Odd-parity stability of black holes in Einstein-Aether gravity
Shinji Tsujikawa, Chao Zhang, Xiang Zhao +1
In Einstein-Aether theory, we study the stability of black holes against odd-parity perturbations on a spherically symmetric and static background. For odd-parity modes, there are…
Non-oscillating vacuum states and the quantum homogeneity and isotropy hypothesis in Loop Quantum Cosmology
Beatriz Elizaga Navascués, Guillermo A. Mena Marugán, Santiago Prado
We study the compatibility of the quantum homogeneitiy and isotropy hypothesis (QHIH), proposed by Ashtekar and Gupt to restrict the choice of vacuum state for the cosmological per…
Gravitational and Gravitoscalar Thermodynamics
Shoichiro Miyashita
Gravitational thermodynamics and gravitoscalar thermodynamics with boundary geometry are investigated through the partition function, assuming that all Eucl…
Primordial perturbations in kinetically dominated regimes of general relativity and hybrid quantum cosmology
Beatriz Elizaga Navascués, Rafael Jiménez-Llamas, Guillermo A. Mena Marugán
Scalar fields with an energy density dominated by its kinetic part may have played a relevant role in the very early stages of the Universe. Compared to the standard inflationary p…
Spontaneous scalarization of charged stars
Masato Minamitsuji, Shinji Tsujikawa
We study static and spherically symmetric charged stars with a nontrivial profile of the scalar field in Einstein-Maxwell-scalar theories. The scalar field is coupled to a $U(1…
Analytical investigation of pre-inflationary effects in the primordial power spectrum: From General Relativity to hybrid Loop Quantum Cosmology
Beatriz Elizaga Navascués, Guillermo A. Mena Marugán
This work is an analytical study of the main differences between classical inflationary effects of a fast-roll regime and imprints of hybrid Loop Quantum Cosmology (LQC) on the pri…
Quantization ambiguities and the robustness of effective descriptions of primordial perturbations in hybrid Loop Quantum Cosmology
Beatriz Elizaga Navascués, Guillermo A. Mena Marugán
We study the imprint that certain quantization ambiguities may leave in effective regimes of the hybrid loop quantum description of cosmological perturbations. More specifically, i…