Published April 29, 2004 | Version v1
Journal article

Length expectation values in quantum Regge calculus

Description

Regge calculus configuration superspace can be embedded into a more general superspace where the length of any edge is defined ambiguously depending on the 4-tetrahedron containing the edge. Moreover, the latter superspace can be extended further so that even edge lengths in each the 4-tetrahedron are not defined, only area tensors of the 2-faces in it are. We make use of our previous result concerning quantization of the area tensor Regge calculus which gives finite expectation values for areas. Also our result is used showing that quantum measure in the Regge calculus can be uniquely fixed once we know quantum measure on (the space of the functionals on) the superspace of the theory with ambiguously defined edge lengths. We find that in this framework quantization of the usual Regge calculus is defined up to a parameter. The theory may possess nonzero (of the order of Planck scale) or zero length expectation values depending on whether this parameter is larger or smaller than a certain value. Vanishing length expectation values means that the theory is becoming continuous, here dynamically in the originally discrete framework

Additional details

Identifiers

DOI
10.1016/j.physletb.2004.02.041;
arXiv
arXiv:gr-qc/0401053v1;
PII
S0370269304003399;

Publishing Information

Journal Title
Physics Letters. Section B
Journal Volume
586
Journal Issue
3-4
Journal Page Range
p. 411-419
ISSN
0370-2693
CODEN
PYLBAJ

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
37111655
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
EXPECTATION VALUE; FUNCTIONALS; MATHEMATICAL SPACE; QUANTIZATION; REGGE CALCULUS; TENSORS
Descriptors DEC
FUNCTIONS; SPACE

Optional Information

Copyright
Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.