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pro vyhledávání: '"Richard T. Hammond"'
Autor:
Richard T Hammond
This book presents a series of delightful interviews in which natural objects such as an electron, a black hole, a galaxy, and even the vacuum itself, reveal their innermost secrets — not only what they are but also how they feel. A hydrogen atom t
Autor:
Richard T Hammond
Publikováno v:
New Journal of Physics, Vol 18, Iss 6, p 063006 (2016)
Cosmic strings are considered in space–time with torsion derived from a two-form potential, and in Minkowski space–time with electromagnetism. Using the curvature scalar as the geometrical part of the Lagrangian density, and the natural coupling
Externí odkaz:
https://doaj.org/article/932ae68137574ed69f8e4de9a9b01bf2
Autor:
Richard T. Hammond
Dipole fields are common in electromagnetism and may be viewed as the result of a positive and negative charge (or pole) which are close together. A dipole field in gravity is not expected to exist because negative mass has never been observed. Howev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd6fb0af8ef7aecb15d65be53e486d50
http://arxiv.org/abs/2006.00312
http://arxiv.org/abs/2006.00312
Autor:
Richard T. Hammond
Publikováno v:
General Relativity and Gravitation. 51
It is shown the antisymmetric part of the metric tensor is the potential for the spin field. Various metricity conditions are discussed and comparisons are made to other theories, including Einstein’s. It is shown in the weak field limit the theory
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a58b9f7f48c10be5e77167e1ca69819
https://doi.org/10.1007/s10714-019-2572-8
https://doi.org/10.1007/s10714-019-2572-8
Autor:
Richard T. Hammond
Publikováno v:
International Journal of Modern Physics D. 28:1943005
It is shown the antisymmetric part of the metric tensor is the potential for the torsion field, which arises from intrinsic spin. To maintain gauge invariance, the nonsymmetric part of the metric tensor must be generalized to include the electromagne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9aab63bf8b3d8caff5ad986e5a8fa0d
https://doi.org/10.1142/s0218271819430053
https://doi.org/10.1142/s0218271819430053
Autor:
Richard T. Hammond
Publikováno v:
Journal of Modern Physics. :1-8
With the development of local gauge theories of gravitation, it became evident that intrinsic spin was an integral part of the theory. This gave spin a classical formulation that predicted the existence of a new kind of field, the torsion field. To d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cb66d02ddd3b48da1ba7ee1002bcf65
https://doi.org/10.4236/jmp.2012.31001
https://doi.org/10.4236/jmp.2012.31001
Autor:
Richard T. Hammond
Publikováno v:
International Journal of Modern Physics D. 19:2413-2416
It is shown that torsion is required for a complete theory of graviation, and that without it, the equations of gravitation violate fundamental laws. In the first case, we are reminded that, in the absence of external forces, the correct conservation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfd76b356ba16ff489966c37356d9fb7
https://doi.org/10.1142/s0218271810018554
https://doi.org/10.1142/s0218271810018554
Autor:
Richard T. Hammond
Publikováno v:
International Journal of Modern Physics D. 27:1847005
It is shown the intrinsic spin, and only the spin, of the electromagnetic field creates torsion. The struggle raged for decades: How to reconcile the facts that photons have spin, but minimal coupling breaks gauge invariance and therefore must be aba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba7c6211cd10d02e0a9dcc548acc40ca
https://doi.org/10.1142/s0218271818470053
https://doi.org/10.1142/s0218271818470053
Autor:
Richard T. Hammond
Publikováno v:
Modern Physics Letters A. 33:1850021
A fully gauge-invariant topological coupling of torsion to the electromagnetic field is examined. It is shown, while the gravitational fields are unaltered, torsion may serve as a source for electromagnetism and electromagnetism may serve as a source
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2d1a6589867fe67f46f53f594c7b4bc
https://doi.org/10.1142/s0217732318500219
https://doi.org/10.1142/s0217732318500219
Autor:
Richard T. Hammond
Publikováno v:
The Open Applied Physics Journal. 3:6-9
The effect of spin on the equation of motion of a sliding object is assessed. The spatial dependence of the friction force on a spinning object is calculated and used to describe the equation of motion.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4a10b15802ad366574651ac4aeef5f7
https://doi.org/10.2174/1874183501003010006
https://doi.org/10.2174/1874183501003010006