TY - GEN

T1 - Loop quantum gravity as an effective theory

AU - Bojowald, Martin

PY - 2012/12/1

Y1 - 2012/12/1

N2 - As a canonical and generally covariant gauge theory, loop quantum gravity requires special techniques to derive effective actions or equations. If the proper constructions are taken into account, the theory, in spite of considerable ambiguities at the dynamical level, allows for a meaningful phenomenology to be developed, by which it becomes falsifiable. The traditional problems plaguing canonical quantum-gravity theories, such as the anomaly issue or the problem of time, can be overcome or are irrelevant at the effective level, resulting in consistent means of physical evaluations. This contribution presents aspects of canonical equations and related notions of (deformed) space-time structures and discusses implications in loop quantum gravity, such as signature change at high density from holonomy corrections, and falsifiability thanks to inversetriad corrections.

AB - As a canonical and generally covariant gauge theory, loop quantum gravity requires special techniques to derive effective actions or equations. If the proper constructions are taken into account, the theory, in spite of considerable ambiguities at the dynamical level, allows for a meaningful phenomenology to be developed, by which it becomes falsifiable. The traditional problems plaguing canonical quantum-gravity theories, such as the anomaly issue or the problem of time, can be overcome or are irrelevant at the effective level, resulting in consistent means of physical evaluations. This contribution presents aspects of canonical equations and related notions of (deformed) space-time structures and discusses implications in loop quantum gravity, such as signature change at high density from holonomy corrections, and falsifiability thanks to inversetriad corrections.

UR - http://www.scopus.com/inward/record.url?scp=84874477742&partnerID=8YFLogxK

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U2 - 10.1063/1.4756960

DO - 10.1063/1.4756960

M3 - Conference contribution

AN - SCOPUS:84874477742

SN - 9780735410954

T3 - AIP Conference Proceedings

SP - 5

EP - 30

BT - Sixth International School on Field Theory and Gravitation-2012

T2 - 6th International School on Field Theory and Gravitation-2012, ISFTG 2012

Y2 - 23 April 2012 through 27 April 2012

ER -