ON QUANTUM GRAVITY, ASYMPTOTIC SAFETY AND PARAMAGNETIC DOMINANCE
| Autor: | Andreas Nink, Martin Reuter |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
High Energy Physics - Theory
Physics Gravity (chemistry) Vacuum state Asymptotic safety in quantum gravity FOS: Physical sciences Astronomy and Astrophysics General Relativity and Quantum Cosmology (gr-qc) Fixed point Renormalization group General Relativity and Quantum Cosmology Renormalization High Energy Physics - Phenomenology Theoretical physics High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th) Space and Planetary Science Quantum gravity Functional renormalization group Quantum Mathematical Physics |
| Zdroj: | International Journal of Modern Physics D. 22:1330008 |
| ISSN: | 1793-6594 0218-2718 |
| Popis: | We discuss the conceptual ideas underlying the Asymptotic Safety approach to the nonperturbative renormalization of gravity. By now numerous functional renormalization group studies predict the existence of a suitable nontrivial ultraviolet fixed point. We use an analogy to elementary magnetic systems to uncover the physical mechanism behind the emergence of this fixed point. It is seen to result from the dominance of certain paramagnetic-type interactions over diamagnetic ones. Furthermore, the spacetimes of Quantum Einstein Gravity behave like a polarizable medium with a "paramagnetic" response to external perturbations. Similarities with the vacuum state of Yang-Mills theory are pointed out. 20 pages, 3 figures. Conference proceedings based on a plenary talk given by M.R. at the 13th Marcel Grossmann Meeting, Stockholm, 1-7 July 2012 |
| Databáze: | OpenAIRE |
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