Comment on "Are the spectra of geometrical operators in Loop Quantum Gravity really discrete?" by B. Dittrich and T. Thiemann
| dc.creator | Rovelli, Carlo | |
| dc.date | 2007-08-20 | |
| dc.date.accessioned | 2026-07-07T08:24:16Z | |
| dc.date.available | 2026-07-07T08:24:16Z | |
| dc.description | I argue that the prediction of physical discreteness at the Planck scale in loop gravity is a reasonable conclusion that derives from a sensible ensemble of hypotheses, in spite of some contrary arguments considered in an interesting recent paper by Dittrich and Thiemann. The counter-example presented by Dittrich and Thiemann illustrates a pathology which does not seem to be present in gravity. I also point out a common confusion between two distinct frameworks for the interpretation of general-covariant quantum theory, and observe that within one of these, the derivation of physical discreteness is immediate, and not in contradiction with gauge invariance. | |
| dc.description | 6 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/0708.2481 | |
| dc.identifier | http://arxiv.org/abs/0708.2481 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/136286 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Comment on "Are the spectra of geometrical operators in Loop Quantum Gravity really discrete?" by B. Dittrich and T. Thiemann | |
| dc.type | text |