Einstein frame or Jordan frame ? [article]

Valerio Faraoni, Edgard Gunzig
1999 arXiv   pre-print
Scalar-tensor theories of gravity can be formulated in the Jordan or in the Einstein frame, which are conformally related. The issue of which conformal frame is physical is a contentious one; we provide a straightforward example based on gravitational waves in order to clarify the issue.
arXiv:astro-ph/9910176v1 fatcat:i27jfpkjsnfmzh637kynrn2xra