Results 31 to 40 of about 1,145,029 (201)
Gravity and Scalar Fields [PDF]
, 2014 21 pages, based on a lecture given at the Seventh Aegean Summer School "Beyond Einstein's Theory of Gravity"
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Scalar field as a null dust [PDF]
The European Physical Journal C, 2019 We show that a canonical, minimally coupled scalar field which is non-self interacting and massless is equivalent to a null dust fluid (whether it is a test or a gravitating field), in a spacetime region in which its gradient is null. Under similar conditions, the gravitating and nonminimally coupled Brans-Dicke-like scalar of scalar-tensor gravity ...
Faraoni, Valerio, Côté, Jeremy
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Massive scalar counterpart of gravitational waves in scalarized neutron star binaries [PDF]
Eur. Phys. J. C (2017) 77:641, 2019 In analogy with spontaneous magnetization of ferromagnets below the Curie temperature, a neutron star (NS), with a compactness above a certain critical value, may undergo spontaneous scalarization and exhibit an interior nontrivial scalar configuration.
arxiv +1 more source
Random scalar fields and hyperuniformity [PDF]
Journal of Applied Physics, 2017 Disordered many-particle hyperuniform systems are exotic amorphous states of matter that lie between crystals and liquids. Hyperuniform systems have attracted recent attention because they are endowed with novel transport and optical properties. Recently, the hyperuniformity concept has been generalized to characterize two-phase media, scalar fields ...
Zheng Ma, Salvatore Torquato
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Spontaneous scalarization with massive fields
Physical Review D, 2016 We study the effect of a mass term in the spontaneous scalarization of neutron stars, for a wide range of scalar field parameters and neutron star equations of state. Even though massless scalars have been the focus of interest in spontaneous scalarization so far, recent observations of binary systems rule out most of their interesting parameter space.
Fethi M. Ramazanoğlu +2 more
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Stippling of 2D Scalar Fields [PDF]
IEEE Transactions on Visualization and Computer Graphics, 2019 We propose a technique to represent two-dimensional data using stipples. While stippling is often regarded as an illustrative method, we argue that it is worth investigating its suitability for the visualization domain. For this purpose, we generalize the Linde-Buzo-Gray stippling algorithm for information visualization purposes to encode continuous ...
Jochen Gortler +4 more
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Reformulating scalar–tensor field theories as scalar–scalar field theories using a novel geometry
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2022 In this paper, I shall show how the notions of Finsler geometry can be used to construct a similar geometry using a scalar field, f , on the cotangent bundle of a differentiable manifold M . This will enable me to use the second vertical derivatives of f , along with ...
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Entropic quantization of scalar fields [PDF]
AIP Conference Proceedings, 2015 10 pages. Presented at MaxEnt 2014, the 34th International Workshop on Bayesian Inference and Maximum Entropy Methods in Science and Engineering (September 21--26, 2014, Amboise, France)
Ariel Caticha, Selman Ipek
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Massive-Field Approach to the Scalar Self Force in Curved Spacetime [PDF]
Phys.Rev. D69 (2004) 064035, 2003 We derive a new regularization method for the calculation of the (massless) scalar self force in curved spacetime. In this method, the scalar self force is expressed in terms of the difference between two retarded scalar fields: the massless scalar field, and an auxiliary massive scalar field.
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Scalar fields and the FLRW singularity [PDF]
Classical and Quantum Gravity, 2019 The dynamics of multiple scalar fields on a flat FLRW spacetime can be described entirely as a relational system in terms of the matter alone. The matter dynamics is an autonomous system from which the geometrical dynamics can be inferred, and this autonomous system remains deterministic at the point corresponding to the singularity of the cosmology ...
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