搜索结果: 1-15 共查到“物理学 Gravity”相关记录201条 . 查询时间(0.109 秒)
A signal-strength model for gravity-field spectrum components in a local space
Earth's Gravitational Potential Local Area Spectrum Structure Spherical Cap Harmonic Analysi
2015/8/26
In the Earth gravity-field model, potential coefficients are projections of the Earth gravitational potential on the corresponding spherical harmonics by degree and order. These coefficients reflect t...
Supersymmetry and stationary solutions in dilaton-axion gravity
Gravity is fixed charged Taub - the NUT steel pipe concrete the construction
2014/12/23
New stationary solutions of four-dimensional dilaton-axion gravity are presented, which correspond to the charged Taub-NUT and Israel-Wilson-Perjés (IWP) solutions of Einstein-Maxwell theory. The char...
On black strings & branes in Lovelock gravity
Black string membrane pure Einstein gravitational black holes vacuum constant curvature space
2014/12/20
It is well known that black strings and branes may be constructed in pure Einstein gravity simply by adding flat directions to a vacuum black hole solution. A similar construction holds in the presenc...
The attractor mechanism in Gauss-Bonnet gravity
A black hole gravitational coupling system the second derivative
2014/12/20
We study extremal black hole solutions of D = 5 Gauss-Bonnet gravity coupled to a system of gauge and scalar fields. As in Einstein gravity, we find that the values of the scalar fields on the horizon...
We present C-functions for static and spherically symmetric spacetimes in Lovelock gravity theories. These functions are monotonically increasing functions of the outward radial coordinate and acquire...
Smarr formula and an extended first law for Lovelock gravity
Static properties lovelock gravitational black holes lovelock theory lovelock coupling
2014/12/18
We study properties of static, asymptotically AdS black holes in Lovelock gravity. Our main result is a Smarr formula that gives the mass in terms of geometrical quantities together with the parameter...
Breaking diffeomorphism invariance and tests for the emergence of gravity
General relativity violates diffeomorphism invariance disrupting sex match the test parameters Newton formalism
2014/12/18
If general relativity is an emergent phenomenon, there may be small violations of diffeomorphism invariance. We propose a phenomenology of perturbatively small violations of general relativity by the ...
Measurements of Gravity Driven Granular Channel Flows
Measurements of Gravity Driven Granular Channel Flows
2014/11/20
This dissertation presents experiments that studied two gravity driven granular channel flows. The first experiment used magnetic resonance imaging to measure the density and displacement distribution...
Gravity, strings, modular and quasimodular forms
Gravity strings modular and quasimodular forms Mathematical Physics
2012/6/19
Modular and quasimodular forms have played an important role in gravity and string theory. Eisenstein series have appeared systematically in the determination of spectrums and partition functions, in ...
A study of generalized second law of thermodynamics in modified f(R) Horava-Lifshitz gravity
generalized second law of thermodynamics modified f(R) Horava-Lifshitz gravity General Physics
2012/4/27
This work investigates the validity of the generalized second law of thermodynamics in modi?ed f(R) Horava-Lifshitz gravity proposed by Chaichian et al (2010) [Class. Quantum Grav. 27 (2010) 185021], ...
Special solutions to a compact equation for deep-water gravity waves
Special solutions compact equation deep-water gravity waves Classical Physics
2012/4/24
Recently, Dyachenko & Zakharov (2011) have derived a compact form of the well known Zakharov integro-differential equation for the third order Hamiltonian dynamics of a potential flow of an incompress...
Running coupling in electroweak interactions of leptons from f(R)-gravity with torsion
Running coupling electroweak interactions leptons f(R)-gravity with torsion
2012/2/23
The f(R)-gravitational theory with torsion is considered for one family of leptons; it is found that the torsion tensor gives rise to interactions having the structure of the weak forces while the int...
Optimal, scalable forward models for computing gravity anomalies
Optimal scalable forward models computing gravity anomalies
2011/8/18
Abstract: We describe three approaches for computing a gravity signal from a density anomaly. The first approach consists of the classical "summation" technique, whilst the remaining two methods solve...
An inhomogeneous toy-model of the quantum gravity with explicitly evolvable observables
quantum gravity inhomogeneous toy-model explicitly evolvable observables
2011/9/30
Abstract: We consider an inhomogeneous (1+1)-dimensional model of the quantum gravity, which has a system of constraints (hamiltonian and momentum ones) by analogy with that of the General Relativity....
Gedanken experiments with Casimir forces, vacuum energy, and gravity
Casimir force quantum vacuum gravity mass
2011/8/2
Gedanken experiments with Casimir forces, vacuum energy, and gravity.
