Read e-book online Conceptual foundations of quantum field theory PDF

By Tian Yu Cao

ISBN-10: 0511470819

ISBN-13: 9780511470813

ISBN-10: 0521602726

ISBN-13: 9780521602723

ISBN-10: 0521631521

ISBN-13: 9780521631525

Quantum box conception is a robust language for the outline of the subatomic ingredients of the actual international and the legislation and rules that govern them. This ebook comprises updated in-depth analyses, through a gaggle of eminent physicists and philosophers of technology, of our current figuring out of its conceptual foundations, of the explanations why this knowing should be revised in order that the speculation can cross additional, and of attainable instructions during which revisions could be promising and efficient. those analyses should be of curiosity to graduate scholars and examine staff in physics who need to know in regards to the foundational difficulties in their topic. The booklet may also be of curiosity to specialist philosophers, historians and sociologists of technological know-how, since it comprises a lot fabric for metaphysical and methodological reflections, for historic and cultural analyses, and for sociological analyses of ways during which different factors give a contribution to the way in which the principles are revised.

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See Svend E. Rugh, Henrik Zinkernagel and Tian Yu Cao: 'The Casimir Effect and the Interpretation of the Vacuum,' forthcoming in Studies in History and Philosophy of Modern Physics. Introduction: Conceptual issues in QFT 11 3 Locality and consistency In 19th century physics, fields were conceived as the states of the ether that permeates or even coincides with the Newtonian absolute space, either in the form of the mechanical ether (Maxwell), or in the form of the demechanized ether (Lorentz). They were also conceived as the states of space itself, as the distribution of physical properties over various localities of space, an idea that was first speculated on by Faraday, and then picked up by Einstein in his early reflections on the foundations of physics.

Some of these questions, to use Glashow's terminology, are empirical, others are intrinsic, still others are emergent. But there are also some meta-questions that cannot be answered or even addressed within the context of the standard model. As pointed out by Treiman in his comments, the standard model isflexibleenough to adapt itself to many of these questions, and to many other possible big surprises as well. But thisflexibilityis not incompatible with the claim that the standard model is a mature model within the context of QFT, whose success has ruled out all other models except, perhaps, string theory (which, however, is claimed to have gone beyond the framework of QFT), because there are no new fundamental laws that can be discovered within the framework of QFT.

This linkage can be physically justified by the idea that the fields' behaviors at different scales are connected through their intrinsic quantum fluctuations owing to the coupling of the fluctuations at different scales. The difference and linkage of parameters at different scales can be summarized by the concept of scale dependence of parameters, the physical justification of which is usually provided by the screening or anti-screening effects of the fluctuating and polarized vacuum. The idea of a continuous scale dependence of electric charge, or equivalently the idea that charge can be renormalized at various scales and that the variation of the renormalized charge is continuous and smooth, first suggested by Dirac in 1933 14 See contributions to this volume by Fisher, Weinberg, Nelson and Cao.

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Conceptual foundations of quantum field theory by Tian Yu Cao

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