Publication:
Immirzi ambiguity, boosts and conformal frames for black holes

dc.contributor.authorGaray Elizondo, Luis Javier
dc.contributor.authorMena Marugán, Guillermo A.
dc.date.accessioned2023-06-20T10:51:47Z
dc.date.available2023-06-20T10:51:47Z
dc.date.issued2003-04-21
dc.description© IOP Publishing. The authors acknowledge DGESIC for financial support under Research Project No. BFM2001-0213.
dc.description.abstractWe analyse changes of the Immirzi parameter in loop quantum gravity and compare their consequences with those of Lorentz boosts and constant conformal transformations in black-hole physics. We show that the effective value deduced for the Planck length in local measurements of vacuum black holes by an asymptotic observer may depend on its conformal or Lorentz frame. This introduces an apparent ambiguity in the expression of the black-hole entropy which is analogous to that produced by the Immirzi parameter. For quantities involving a notion of energy, the similarity between the implications of the Immirzi ambiguity and a conformal scaling disappears, but the parallelism with boosts is maintained.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipDGESIC
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/29858
dc.identifier.citation[1] Wald R M 1984 General Relativity (Chicago: University of Chicago Press) [2] Bardeen J M, Carter B and Hawking S W 1973 Commun. Math. Phys. 31 161 [3] Bekenstein J D 1973 Phys Rev. D 7 2333 Bekenstein J D 1974 Phys Rev. D 9 3292 [4] Hawking S W 1975 Commun. Math. Phys. 43 199 [5] Strominger A and Vafa C 1996 Phys. Lett. B 379 99 Maldacena J and Strominger A 1996 Phys. Rev. Lett. 77 428 [6] Ashtekar A, Baez J, Corichi A and Krasnov K 1998 Phys. Rev. Lett. 80 904 Ashtekar A, Baez J C and Krasnov K 2001 Adv. Theor. Math. Phys. 4 1 [7] Ashtekar A 1991 Lectures on Non-Perturbative Canonical Gravity ed L Z Fang and R Ruffini (Singapore: World Scientific) Thiemann T 2001 Introduction to Modern Canonical Quantum General Relativity Preprint gr-qc/0110034 [8] Immirzi G 1997 Nucl. Phys. Proc. Suppl. 57 65 Immirzi G 1997 Class. Quantum Grav. 14 L177 [9] Rovelli C and Smolin L 1995 Phys. Rev. D 52 5743 Rovelli C 1998 Living Rev. Rel. 1 1 [10] Rovelli C and Smolin L 1995 Nucl. Phys. B 442 593 Rovelli C and Smolin L 1995 Nucl. Phys. B 456 753 [11] Ashtekar A and Lewandowski J 1997 Class. Quantum Grav. 14 A55 [12] Ashtekar A, Corichi A and Krasnov K 2000 Adv. Theor. Math. Phys. 3 419 [13] Rovelli C and Thiemann T 1998 Phys. Rev. D 57 1009 Gambini R, Obregón O and Pullin J 1999 Phys. Rev. D 59 047505 Samuel J 2001 Phys. Rev. D 64 048501 (2001) Mena Marugán G A 2002 Class. Quantum Grav. 19 L63 [14] Garay L J and Mena Marugán G A 2002 Phys. Rev. D 66 024021 [15] Alexandrov S 2000 Class. Quantum Grav. 17 4255 Alexandrov S 2002 Phys. Rev. D 65 024011 [16] Birrell N D and Davies P C W 1986 Quantum Fields in Curved Space ed P V Landshoff et al. (Cambridge: Cambridge University Press) [17] Duff M J, Okun L B and Veneziano G 2002 JHEP 0203 023 [18] French A P 1968 Special Relativity (New York: Norton) [19] To be more precise, we disregard measurements that require an unbounded amount of time when the asymptotic flat region is approached [20] Amelino-Camelia G 2002 On the Fate of Lorentz Symmetry in Loop Quantum Gravity and Noncommutative Spacetimes Preprint gr-qc/0205125 [21] Magueijo J and Smolin L 2002 Phys. Rev. Lett. 88 190403
dc.identifier.doi10.1088/0264-9381/20/8/103
dc.identifier.issn0264-9381
dc.identifier.officialurlhttp://dx.doi.org/10.1088/0264-9381/20/8/103
dc.identifier.relatedurlhttp://iopscience.iop.org/
dc.identifier.relatedurlhttp://lib-arxiv-008.serverfarm.cornell.edu/pdf/gr-qc/0304055.pdf
dc.identifier.urihttps://hdl.handle.net/20.500.14352/51355
dc.issue.number8
dc.journal.titleClassical and quantum gravity
dc.language.isoeng
dc.page.finalL121
dc.page.initialL115
dc.publisherIOP Publishing Ltd
dc.relation.projectIDBFM2001-0213
dc.rights.accessRightsopen access
dc.subject.cdu51-73
dc.subject.ucmFísica-Modelos matemáticos
dc.subject.ucmFísica matemática
dc.titleImmirzi ambiguity, boosts and conformal frames for black holes
dc.typejournal article
dc.volume.number20
dspace.entity.typePublication
relation.isAuthorOfPublication5638c18d-1c35-40d2-8b77-eb558c27585e
relation.isAuthorOfPublication.latestForDiscovery5638c18d-1c35-40d2-8b77-eb558c27585e
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