Results 51 to 60 of about 251,804 (253)

FREmu: Power Spectrum Emulator for f(R) Gravity

The Astrophysical Journal
To investigate gravity in the nonlinear regime of cosmic structure using measurements from stage IV surveys, it is imperative to accurately compute large-scale structure observables, such as nonlinear matter power spectra, for gravity models that extend ...
Jiachen Bai, Jun-Qing Xia
doaj   +1 more source

Axiomatic formulations of modified gravity theories with nonlinear dispersion relations and Finsler–Lagrange–Hamilton geometry

European Physical Journal C: Particles and Fields, 2018
We develop an axiomatic geometric approach and provide an unconventional review of modified/nonlinear gravity theories, MGTs, with modified dispersion relations, MDRs, encoding Lorentz invariance violations, LIVs, classical and quantum random effects ...
Laurenţiu Bubuianu, Sergiu I. Vacaru
doaj   +1 more source

Degeneracies between Modified Gravity and Baryonic Physics

, 2018
In order to determine the observable signatures of modified gravity theories, it is important to consider the effect of baryonic physics. We use a modified version of the ISIS code to run cosmological hydrodynamic simulations to study degeneracies ...
Ellewsen, Thor A. S., Falck, Bridget, Mota, David F.   +2 more
core   +1 more source

Fifth forces and discrete symmetry breaking [PDF]

, 1954
Modifications of general relativity often involve coupling additional scalar fields to the Ricci scalar, leading to scalar-tensor theories of Brans-Dicke type.
Millington, Peter
core   +6 more sources

Development of a Synthetic Hydrogel to Foster Microvascularization of an Endometriosis Microphysiological System

Advanced Healthcare Materials, EarlyView.
ABSTRACT The ascent of novel alternative methods in drug development spotlights the dual needs for improved biological fidelity to in vivo, along with reproducibility, especially in regulatory applications. The need for pre‐clinical models of patient‐derived endometriosis lesions motivates the development of a vascularizable, completely synthetic ...
Lauren Pruett, Laura Bahlmann, Ryan Ogi, Angela Jiao, Priyatanu Roy, Matthew Johnson, David Trumper, Linda Griffith   +7 more
wiley   +1 more source

Observational Test of f(Q) Gravity with Weak Gravitational Lensing

The Astrophysical Journal
In this article we confront a class of f ( Q ) gravity models with observational data of galaxy–galaxy lensing. Specifically, we consider f ( Q ) gravity models containing a small quadratic correction when compared with general relativity (GR), and ...
Qingqing Wang, Xin Ren, Yi-Fu Cai, Wentao Luo, Emmanuel N. Saridakis   +4 more
doaj   +1 more source

Aspects of Weyl supergravity

Journal of High Energy Physics, 2018
In this paper we study the spectrum of all conformal, N $$ \mathcal{N} $$-extended supergravities ( N $$ \mathcal{N} $$ = 1, 2, 3, 4) in four space-time dimensions.
Sergio Ferrara, Alex Kehagias, Dieter Lüst   +2 more
doaj   +1 more source

Inconsistency of islands in theories with long-range gravity

Journal of High Energy Physics, 2022
In ordinary gravitational theories, any local bulk operator in an entanglement wedge is accompanied by a long-range gravitational dressing that extends to the asymptotic part of the wedge.
Hao Geng, Andreas Karch, Carlos Perez-Pardavila, Suvrat Raju, Lisa Randall, Marcos Riojas, Sanjit Shashi   +6 more
doaj   +1 more source

Enhanced Endoscopic Internal Drainage of Gastric Abscess Through Additively Manufactured Stents

Advanced Healthcare Materials, EarlyView.
Postoperative gastric leaks are often treated with off‐label biliary double‐pigtail stents, yet conventional extruded designs are not optimized for leak anatomy, can migrate, and may limit abscess evacuation. PETALS is introduced to optimize transmural drainage geometry and enable patient‐specific 3D‐printable stents.
Parima Phowarasoontorn, Yongbin Ko, Juan S. Barajas‐Gamboa, Juan P. Pantoja, Oraib Al‐Ketan, Mohamed Ali, Sungyun Sohn, Heba Tageldeen Naser, Abdel‐Hameed Dabbour, Batoul Khlaifat, Ahmed AlZubaidi, Carlos Abril Vega, John Rodriguez, Matthew Kroh, Khalil B. Ramadi   +14 more
wiley   +1 more source

Carroll versus Galilei gravity

Journal of High Energy Physics, 2017
We consider two distinct limits of General Relativity that in contrast to the standard non-relativistic limit can be taken at the level of the Einstein-Hilbert action instead of the equations of motion.
Eric Bergshoeff, Joaquim Gomis, Blaise Rollier, Jan Rosseel, Tonnis ter Veldhuis   +4 more
doaj   +1 more source