Measurement of Gravitomagnetic and Acceleration Fields Around Rotating Superconductors

Plesescu, F.; Seifert, Bernhard; Marhold, Klaus

doi:10.1002/chin.200734232

Cited by 9 publications

(10 citation statements)

References 6 publications

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“…A possible application to GW detection could in principle result from similar effects, analogous to (time varying) gravitoelectromagnetic effects on gyroscopes, using SQUIDS. On the other hand, rotating superconducting matter seems to generate anomalous stronger gravitomagnetic fields (anomalous gravitomagnetic London moment) [27,28] and if these results are robustly confirmed then superconductivity and superfluidity might somehow amplify gravitational phenomena. This speculation deserves further theoretical and experimental research as it could contribute for GW detection.…”

Section: B On the Physics Of Electromagnetism In Curved Spacetimementioning

confidence: 99%

Electrodynamics and Spacetime Geometry: Foundations

Cabral

2016

Found Phys

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We explore the intimate connection between spacetime geometry and electrodynamics. This link is already implicit in the constitutive relations between the field strengths and excitations, which are an essential part of the axiomatic structure of electromagnetism, clearly formulated via integration theory and differential forms. We briefly review the foundations of electromagnetism based on charge and magnetic flux conservation, the Lorentz force and the constitutive relations which introduce the spacetime metric. We then proceed with the tensor formulation by assuming local, linear, homogeneous and isotropic constitutive relations, and explore the physical, observable consequences of Maxwell's equations in curved spacetime. The field equations, charge conservation and the Lorentz force are explicitly expressed in general (pseudo) Riemanian manifolds. The generalized Gauss and Maxwell-Ampère laws, as well as the wave equations, reveal potentially interesting astrophysical applications. In all cases new electromagnetic couplings and related phenomena are induced by spacetime curvature. The implications and possible applications for gravity waves detection are briefly addressed. At the foundational level, we discuss the possibility of generalizing the vacuum constitutive relations, by relaxing the fixed conditions of homogeneity and isotropy, and by assuming that the symmetry properties of the electro-vacuum follow the spacetime isometries. The implications of this extension are briefly discussed in the context of the intimate connection between electromagnetism and the geometry (and causal structure) of spacetime.

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Section: B On the Physics Of Electromagnetism In Curved Spacetimementioning

confidence: 99%

Electrodynamics and Spacetime Geometry: Foundations

Cabral

2016

Found Phys

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“…The proposed photon‐embodied physical vacuum that gives rise to both gravitational and electromagnetic fields sheds light also on recent experiments where inertial effects come into sight when a superconducting ring is accelerated (Tajmar et al 2007). The superconducting characteristics imply a highly stationary state that entrains also the density of surrounding photons which are here understood to embody both the electromagnetic and gravitational potentials (Lano 1996).…”

Section: Discussionmentioning

confidence: 91%

Probing Mach’s principle

Annila

2012

Monthly Notices of the Royal Astronomical Society

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The principle of least action in its original form á la Maupertuis is used to explain geodetic and frame‐dragging precessions which are customarily accounted for a curved space–time in general relativity. The least‐time equations of motion agree with observations and are also in concert with general relativity. Yet according to the least‐time principle, gravitation does not relate to the mathematical metric of space–time, but to a tangible energy density embodied by photons. The density of free space is in balance with the total mass of the Universein accord with the Planck law. Likewise, a local photon density and its phase distribution are in balance with the mass and charge distribution of a local body. Here gravitational force is understood as an energy density difference that will diminish when the oppositely polarized pairs of photons co‐propagate from the energy‐dense system of bodies to the energy‐sparse system of the surrounding free space. Thus when the body changes its state of motion, the surrounding energy density must accommodate the change. The concurrent resistance in restructuring the surroundings, ultimately involving the entire Universe, is known as inertia. The all‐around propagating energy density couples everything with everything else in accord with Mach’s principle.

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“…[1,2] General relativity involves advanced mathematics which is not easily accessible to undergraduate students or engineers, therefore scientists tried to derive a simple framework to calculate these effects which is called Gravitomagnetism. [3,4,5,6,7] Forward was one of the first scientists to derive a set of Maxwell-like equations [8] that allow to calculate frame-dragging effects similar to electromagnetic effects in the weak-field and low-speed limit of general relativity.…”

Section: Introductionmentioning

confidence: 99%

Gravitational induction with Weber’s force

Assis

2015

Can. J. Phys.

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According to Faraday's law of induction, when we change the current intensity in a primary electric circuit we can induce a current in a secondary circuit under appropriate conditions. An electric current means charges in motion. Microscopically we can express Faraday's law by saying that when we accelerate charges in the primary circuit, a force is exerted on charges of the secondary circuit which can accelerate them. A similar effect also exists in gravity with accelerated masses but of course with much less intensity. The phenomenon is called frame dragging and can be derived from general relativity theory. Here we present an alternative way to calculate such gravitational induction forces based on Weber's law which only involves simple mathematics and incorporates other fundamental concepts such as Newton's third law and Mach's principle as the origin of inertia. It therefore summarizes all low velocity gravitationallyrelevant effects into a single equation.

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Measurement of Gravitomagnetic and Acceleration Fields Around Rotating Superconductors

Cited by 9 publications

References 6 publications

Electrodynamics and Spacetime Geometry: Foundations

Electrodynamics and Spacetime Geometry: Foundations

Probing Mach’s principle

Gravitational induction with Weber’s force

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