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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: John Moffat


TBA
Speaker(s): John Moffat
Abstract:
Date: 14/11/2012 - 8:00 pm

Ultraviolet Complete Quantum Gravity
Speaker(s): John Moffat
Abstract: An ultraviolet complete quantum gravity theory is formulated in which vertex functions in Feynman graphs are entire functions and the propagating graviton is described by a local, causal propagator. A scalar-tensor action describes classical gravity theory. The cosmological constant problem is inves... read more
Date: 28/10/2010 - 2:30 pm

Void or Dark Energy?
Speaker(s): John Moffat
Abstract: Two possible explanations for the type SNe Ia supernovae observations are a nonlinear, underdense void embedded in a matter dominated Einstein-de Sitter spacetime or dark energy in the ?CDM model. Both of these alternatives are faced with Copernican fine-tuning problems. A case is made for the void ... read more
Date: 17/11/2009 - 2:00 pm

Positive and Negative Energy Symmetry and the Cosmological Constant Problem
Speaker(s): John Moffat
Abstract: The Hamiltonian for the quantized gravitational and matter fields contains both positive and negative energy particle contributions, which leads through a positive and negative energy symmetry of the vacuum to a cancellation of the zero-point vacuum energy and a vanishing cosmological constant in th... read more
Date: 25/05/2009 - 2:45 pm

Redesigning Electroweak Theory: Does the Higgs Particle Exist?
Speaker(s): John Moffat
Abstract: An electroweak model in which the masses of the W and Z bosons and the fermions are generated by quantum loop graphs through a symmetry breaking of the vacuum is investigated. The model is based on a regularized quantum field theory in which the quantum loop graphs are finite to all orders of pertur... read more
Date: 20/02/2009 - 1:00 pm

Modified Gravity and Its Consequences for Astronomy, Astrophysics and Cosmology
Speaker(s): John Moffat
Abstract: The consequences of a modified gravity (MOG) are explored. I demonstrate how the solutions of the field equations obtained from the action principle of the MOG lead to a theory without any free, adjustable parameters or ad-hoc empirical formulae. The theory successfully explains solar system obse... read more
Date: 19/02/2008 - 2:00 pm

Modified Gravity and its Consequences for the Solar System, Astrophysics and Cosmology
Speaker(s): John Moffat
Abstract:
Date: 20/05/2007 - 4:30 pm

The Pioneer Anomaly
Speaker(s): John Moffat
Abstract:
Date: 27/09/2005 - 2:00 pm

Einstein - Relativity and Beyond
Abstract: Einstein’s profound ideas about relativity and the quantum have provided generations of people with some of the most thought-provoking concepts ever proposed about the wonders and mysteries of our universe. This lively panel discussion will examine Einstein’s enormous contributions to our understa... read more
Date: 12/08/2005 - 12:35 pm
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