INEQUIVALENCE OF FIRST-ORDER AND 2ND-ORDER FORMULATIONS IN D=2 GRAVITY MODELS

Authors
DESER S
Citation
S. Deser, INEQUIVALENCE OF FIRST-ORDER AND 2ND-ORDER FORMULATIONS IN D=2 GRAVITY MODELS, Foundations of physics, 26(5), 1996, pp. 617-621
Citations number
6
Categorie Soggetti
Physics
Journal title
Foundations of physics → ACNP
ISSN journal
00159018
Volume
26
Issue
5
Year of publication
1996
Pages
617 - 621
Database
ISI
SICI code
0015-9018(1996)26:5<617:IOFA2F>2.0.ZU;2-0
Abstract
The usual equivalence between the Palatini and metric (or affinity and vielbein) formulations of Einstein theory fails in two spacetime dime nsions for its ''Kaluza-Klein'' reduced (as well as for its standard) version. Among the differences is the necessary vanishing of the cosmo logical constant in the first-order forms. The purely affine Eddington formulation of Einstein theory also fails here.