John Moffat
John W. Moffat (* 1932 ) is a Canadian theoretical physicist who specializes in particle physics , quantum field theory , quantum gravity and cosmology .
Life
Moffat wanted to be a painter in his youth and lived in Paris for some time. He studied in Copenhagen and received his doctorate in 1958 at Cambridge University (Trinity College) with Fred Hoyle and Abdus Salam . He was a professor at the University of Toronto . He was also an adjunct professor at the University of Waterloo and did research at the Perimeter Institute .
In 2012 he received a lucrative scholarship from the Templeton Foundation.
Variable speed of light
In 1992 he developed a cosmological theory in which the speed of light was higher in the past than it is today ( Variable Speed of Light , VSL), with which he explained some of the cosmological problems otherwise solved in the inflation theory . It also predicts another fine structure constant in the past, which can be observed in principle. In 2000, a similar theory was proposed by João Magueijo and others.
Modified gravity
In 1995, Moffat proposed a theory of gravitation with an antisymmetric component in the metric (in addition to the symmetrical component of Einstein's usual theory of general relativity) and in 1990 a non-local theory (which nevertheless does not violate causality) of the electroweak interaction with mass generation without Higgsboson.
In 2005 he proposed a scalar tensor vector theory of gravitation ( Modified Gravity , MOG for short ), which works without dark matter and whose effect is explained by a modified gravitational interaction.
According to the MOG theory, black holes have a much larger silhouette ( black hole's “shadow” ) than predicted by general relativity. The effect could in principle be observable in the Galactic Center , for example with the Event Horizon Telescope from 2017.
Works
- Books
- Reinventing Gravity, Harper Collins, 2008
- Einstein Wrote Back, Thomas Allen Publishers, 2010
- Cracking the Quantum Code of the Universe, Oxford University Press, 2014
- Fonts (selection)
- Finite nonlocal gauge field theory, Phys. Rev. D 41, 1990, 1177-1184, doi: 10.1103 / PhysRevD.41.1177
- Superluminary Universe: A Possible Solution to the Initial Value Problem in Cosmology, Int. Jour. Mod. Phys. D 2, 1993, 351-366, arxiv : gr-qc / 9211020
- Nonsymmetric Gravitational Theory, Phys. Lett. B 355, 1995, 447-452, arxiv : gr-qc / 9411006
- Scalar-Tensor-Vector Gravity Theory, JCAP 0603: 004, 2006, arxiv : gr-qc / 0506021
Web links
Individual evidence
- ^ Author of the book Faster than the speed of light , 2002
- ^ Moffat Scalar Tensor Vector Gravity , J. Cosmology Astroparticle Physics, Volume 3, 2006
- ^ Moffat, Toth Modified Gravity: Cosmology without dark matter or Einstein's cosmological constant , 2007
- ↑ JW Moffat: Modified Gravity Black Holes and their Observable Shadows, Perimeter Institute for Theoretical Physics, Waterloo, February 27, 2015, arxiv : 1502.01677 .
| personal data | |
|---|---|
| SURNAME | Moffat, John |
| ALTERNATIVE NAMES | Moffat, John W. |
| BRIEF DESCRIPTION | Canadian theoretical physicist |
| DATE OF BIRTH | 1932 |