The BEH mechanism operates within the context of gauge theories. Despite the fact that grand unification schemes reach scales comparable to the Planck scale, there was, a priori, no indication that Yang-Mills fields offer any insight into quantum gravity. The only approach to quantum gravity that had some success, in particular in the context of a quantum interpretation of the black hole entropies, are the superstring theory approaches and the possible merging of the five perturbative approaches (Type IIA, IIB, Type I and the two heterotic strings) into an elusive M-theory whose classical limit would be 11-dimensional supergravity.
Francois EnglertRelated topics
approach black classical comparable context despite fact five gauge grand gravity hole indication insight interpretation limit mechanism merging offer particular possible quantum reach scale success theory type unification m-theory planck scales approaches fields heterotic iia iib strings supergravity superstringRelated quotes
And therefore we can see just how constructive this Spinozian difference is, just how constructive this negativity really is! The organic interweaving of these two motifs is fundamental in the history of European philosophy. Spinoza is the first to mold this logical mechanism that bourgeois philosophy would constantly and continually try to abrogate during its subsequent development. In Kantianism, as in classical idealism, Spinoza continually remains the object of opposition and polemic: What is destroyed is precisely the intersection between the negation of the ideology and the construction of the world, the inherence of the limit, of the materiality, to the infinite.
Baruch Spinoza
The opening plenary of this Forum will be presenting an overview of the global forces affecting the quality of life of the human community and the challenges they pose for the global community as a whole and for women in particular as we approach the twenty-first century. However, with true womanly understanding, the Convener of this Forum suggested that among these global forces and challenges, I might wish to concentrate on those matters which occupy all my waking thoughts these days: peace, security, human rights and democracy. I would like to discuss these issues particularly in the context of the participation of women in politics and governance.
Aung San Suu Kyi
Considering the pervasive importance of quantum mechanics in modern physics, it is odd how rarely one hears of efforts to test quantum mechanics experimentally with high precision....The trouble is that it is very difficult to find any logically consistent generalization of quantum mechanics. One obvious target for generalization is the linearity of quantum mechanics, but if we arbitrarily add nonlinear terms to the Schrodinger equation, how do we know that the theory we obtain will have a sensible physical interpretation? At least in part, it is the dearth of generalized versions of quantum mechanics that has made it so hard to plan experimental tests of quantum mechanics.
Steven Weinberg
I don't know what monetarism is. If monetarism just means a good old-fashioned quantity theory, of course it has not failed. If it means the particular version of Milton Friedman, I think it has because he imagines that he can achieve - ascertain - a clear quantity relationship between a measurable quantity of money and the price level. I don't think that is possible. In fact, just about 40 years ago in the opening sentences of my book, Prices and Production, I wrote that it would be a great misfortune if people ever cease to believe in the quantity theory of money. It would be even worse ever to believe it literally. And that's exactly what Milton Friedman does.
Friedrich Hayek
If supersymmetry plays the role in physics that we suspect it does, then it is very likely to be discovered by the next generation of particle accelerators, either at Fermilab... or at CERN... Discovery of supersymmetry would be one of the real milestones in physics, made even more exciting by its close links to still more ambitious theoretical ideas. Indeed, supersymmetry is one of the basic requirements of "string theory," which is the framework in which theoretical physicists have had some success in unifying gravity with the rest of the elementary particle forces. Discovery of supersymmetry would would certainly give string theory an enormous boost.
Edward Witten
