ARE THE STRING AND EINSTEIN FRAMES EQUIVALENT?

ENRIQUE ÁLVAREZ, JORGE CONDE
2002 Modern Physics Letters A  
The low energy physics as predicted by strings can be expressed in two (conformally related) different variables, usually called frames. The problem is raised as to whether it is physically possible in some situations to tell one from the other.
doi:10.1142/s0217732302006606 fatcat:iazhk7ndhrc43adqad3eluu6sa