M Asorey et al 2004 Class. Quantum Grav. 21 163 doi:10.1088/0264-9381/21/1/011
Universality and ambiguities of the conformal anomaly
M Asorey1, E V Gorbar2,3 and I L Shapiro2,4
Show affiliationsThe one-loop structure of the trace anomaly is investigated using different regularizations and renormalization schemes: dimensional, proper time and Pauli–Villars. The universality of this anomaly is analysed from a very general perspective. The Euler and Weyl terms of the anomalous trace of the stress tensor are absolutely universal. The pure derivative 
R term is shown to be universal only if the regularization breaks conformal symmetry softly. If the breaking of conformal symmetry by the regularization method is hard the coefficient of this term might become arbitrary which points out the presence of an ambiguous 
term in the effective quantum action. These ambiguities arise in some prescriptions of dimensional and Pauli–Villars regularizations. We discuss the implications of these results for anomaly-induced inflationary scenarios and AdS/CFT correspondence.
- PACS
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04.62.+v Quantum fields in curved spacetime
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- Subjects
- Dates
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Issue 1 (7 January 2004)
Received 1 August 2003
Published 20 November 2003
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Universality and ambiguities of the conformal anomaly
M Asorey et al 2004 Class. Quantum Grav. 21 163
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