Immirzi ambiguity, boosts and conformal frames for black holes



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Garay Elizondo, Luis Javier and Mena Marugán, Guillermo A. (2003) Immirzi ambiguity, boosts and conformal frames for black holes. Classical and quantum gravity, 20 (8). L115-L121. ISSN 0264-9381

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We 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.

Item Type:Article
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© IOP Publishing. The authors acknowledge DGESIC for financial support under Research Project No. BFM2001-0213.

Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:29858
Deposited On:29 Apr 2015 10:32
Last Modified:10 Dec 2018 15:09

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