Concept
Theoretical gravity
Related publications (36)
Anomaly-free scale symmetry and gravity
In this Letter, we address the question of whether the conformal invariance can be considered as a global symmetry of a theory of fundamental interactions. To describe Nature, this theory must contain a mechanism of spontaneous breaking of the scale symmet ...
ELSEVIER2023Coupling metric-affine gravity to a Higgs-like scalar field
General relativity (GR) exists in different formulations. They are equivalent in pure gravity but generically lead to distinct predictions once matter is included. After a brief overview of various versions of GR, we focus on metric-affine gravity, which a ...
AMER PHYSICAL SOC2022Biomechanics at the workplace under hypogravity conditions
The main goal of my research is to establish guidelines for workplace design based on human biomechanics: specifically sitting workplaces and handling areas in 1/6G-1/3G (Moon, Mars) conditions. Such a workplace could be used in long-term space missions in ...
EPFL2022Characterizing human mobility patterns in rural settings of sub-Saharan Africa
Andrea Rinaldo, Theophile Mande, Francisco Javier Perez Saez
Human mobility is a core component of human behavior and its quantification is critical for understanding its impact on infectious disease transmission, traffic forecasting, access to resources and care, intervention strategies, and migratory flows. When m ...
eLIFE SCIENCES PUBL LTD2021Matter matters in Einstein-Cartan gravity
Andrey Shkerin, Georgios Karananas, Sebastian Zell
We study scalar, fermionic and gauge fields coupled nonminimally to gravity in the Einstein-Cartan formulation. We construct a wide class of models with nondynamical torsion whose gravitational spectra comprise only themassless graviton. Eliminating nonpro ...
AMER PHYSICAL SOC2021Thin Liquid Film Dynamics on a Spinning Spheroid
The present work explores the impact of rotation on the dynamics of a thin liquid layer deposited on a spheroid (bi-axial ellipsoid) rotating around its vertical axis. An evolution equation based on the lubrication approximation was derived, which takes in ...
MDPI2021Surface tension and viscosity of liquid Pd43Cu27Ni10P20 measured in a levitation device under microgravity
Roland Logé, Antonia Neels, Alex Dommann
Here we present measurements of surface tension and viscosity of the bulk glass-forming alloy Pd43Cu27Ni10P20 performed during containerless processing under reduced gravity. We applied the oscillating drop method in an electromagnetic levitation facility ...
Springer2019Gravity-Independent Oscillate Boiling
Heat transfer in nucleate boiling relies on the detachment and rise of the boiling bubble, in which gravity plays the dominant role. Previous studies showed that in the absence of gravity, the bubble fails to rise, causing the dryout of the heater and sign ...
SPRINGER2019Tracing the formation of the Milky Way through ultra metal-poor stars
Pascale Jablonka, Nicolas Lawrence Etienne Longeard
We use Gaia DR2 astrometric and photometric data, published radial velocities and MESA models to infer distances, orbits, surface gravities, and effective temperatures for all ultra metal-poor stars ([Fe/H] < -4.0 dex) available in the literature. Assuming ...
OXFORD UNIV PRESS2019Gravity-Insensitive Flexure Pivot Oscillators
Simon Nessim Henein, Ilan Vardi, Etienne Frédéric Gabriel Thalmann, Lennart Rubbert, Mohammad Hussein Kahrobaiyan
Classical mechanical watch plain bearing pivots have frictional losses limiting the quality factor of the hairspring-balance wheel oscillator. Replacement by flexure pivots leads to a drastic reduction in friction and an order of magnitude increase in qual ...
2018