Quantum Gravity: A Dogma of Unification?
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The quest for a theory of quantum gravity is usually understood to be driven by philosophical assumptions external to physics proper. It is suspected that specifically approaches in the context of particle physics are rather based on metaphysical premises than experimental data or physical arguments. I disagree. In this paper, I argue that the quest for a theory of quantum gravity sets an important example of physics’ internal unificatory practice. It is exactly Weinberg’s and others’ particle physics stance that reveals the issue of quantum gravity as a genuine physical problem arising within the framework of quantum field theory.
KeywordsPrinciple of equivalence Unification Quantum field theory Quantum gravity General relativity Graviton/spin-2 particle Lorentz-invariance
- Arkani-Hamed, N. 2010a. The Future of Fundamental Physics. Space-Time Is Doomed; What Replaces It?, Messenger Lecture Series at Cornell University. Lecture.Google Scholar
- Arkani-Hamed, N. 2010b. Robustness of GR. Attempts to Modify Gravity. Part I. Prospects in Theoretical Physics Program. Cornell University. Lecture.Google Scholar
- Arkani-Hamed, N. 2012. The Future of Fundamental Physics. Dædalus 141(3): 53–66.Google Scholar
- Arkani-Hamed, N. 2013. Philosophy of Fundamental Physics. Andrew D. White Professors-at-Large Program. Cornell University. Lecture.Google Scholar
- Belot, G. 2011. Background-Independence. General Relativity and Gravitation 43(10): 2865–2884. arXiv:grqc/1106.0920.Google Scholar
- Brown, H.R., and O. Pooley 2006. Minkowski Space-Time: A Glorious Non-entity. In The Ontology of Spacetime, Volume 1 of Philosophy and Foundations of Physics, ed. D. Dieks, 67–89. Amsterdam: Elsevier.Google Scholar
- Carroll, S. 2004. Spacetime and Geometry. An Introduction to General Relativity. San Francisco: Addison Wesley.Google Scholar
- Donoghue, J. 2014. General Relativity as an Effective Field Theory. PSI Summer School ‘More than Higgs – Effective Theories for Particle Physics’. Zuoz. Lecture. blogs.umass.edu/donoghue/files/2009/06/Zuoz-3.pdf.
- Feynman, R., F.B. Morinigo, W.G. Wagner, and B. Hatfield 1995. Feynman Lectures on Gravitation. Reading, Massachusetts: Addison-Wesley.Google Scholar
- Huggett, N., and C. Callender 2001a. Introduction. In Physics Meets Philosophy at the Planck Scale. Contemporary Theories in Quantum Gravity, ed. N. Huggett and C. Callender, 1–33. Cambridge: Cambridge University Press.Google Scholar
- Huggett, N., and C. Callender 2001b. Why Quantize Gravity (Or Any Other Field for that Matter)? Philosophy of Science 68(Proceedings): S382–S394.Google Scholar
- Lehmkuhl, D. 2008. Is Spacetime a Gravitational Field? In Philosophy and Foundations of Physics, Volume 4: The Ontology of Spacetime, Vol. II, ed. D. Dieks and M. Redei, 83–110. Amsterdam: Elsevier.Google Scholar
- Lehmkuhl, D. 2014. Why Einstein Did Not Believe that General Relativity Geometrizes Gravity. Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 46(Part B): 316–326.Google Scholar
- Mattingly, J. 2005. Is Quantum Gravity Necessary? In The Universe of General Relativity, ed. A.J. Kox and J. Eisenstaedt, 327–338. Basel: Birkhäuser. Talk at the 5th International Conference on the History and Foundations of General Relativity in 1999.Google Scholar
- Nicolis, A. 2011. General Relativity from Lorentz Invariance. Lecture notes. phys.columbia.edu/~nicolis/GR_from_LI_2.pdf.
- Read, J. 2016. Background Independence in Classical and Quantum Gravity. B.Phil. Thesis, University of Oxford.Google Scholar
- Read, J., H.R. Brown, and D. Lehmkuhl 2017. Two Miracles of General Relativity. Manuscript in Preparation.Google Scholar
- Redhead, M. 1999. Quantum Field Theory and the Philosopher. In Conceptual Foundations of Quantum Field Theory, ed. T.Y. Cao, 34–40. Cambridge: Cambridge University Press.Google Scholar
- Rovelli, C. 2016. The dangers of non-empirical confirmation. arXiv:1609.01966.Google Scholar
- Weinberg, S. 1972. Gravitation and Cosmology: Principles and Applications of the General Theory of Relativity. New York: Wiley.Google Scholar
- Weinberg, S. 1999. What Is Quantum Field Theory, and What Did We Think It Is? In Conceptual Foundations of Quantum Field Theory, ed. T. Y. Cao, 241–251. Cambridge: Cambridge University Press.Google Scholar
- Wüthrich, C. 2006. Approaching the Planck Scale from a Generally Relativistic Point of View: A Philosophical Appraisal of Loop Quantum Gravity. Ph.D Thesis, University of Pittsburgh.Google Scholar
- Wüthrich, C. 2012. In Search of Lost Spacetime: Philosophical Issues Arising in Quantum Gravity. In La philosophie de la physique: d’aujourd’hui à demain, ed. S. Le Bihan. Paris: Vuibert. arXiv:1207.1489v1.Google Scholar