Spacetime in string theory

Gary T Horowitz
2005 New Journal of Physics  
We give a brief overview of the nature of spacetime emerging from string theory. This is radically different from the familiar spacetime of Einstein's relativity. At a perturbative level, the spacetime metric appears as "coupling constants" in a two dimensional quantum field theory. Nonperturbatively (with certain boundary conditions), spacetime is not fundamental but must be reconstructed from a holographic, dual theory.
doi:10.1088/1367-2630/7/1/201 fatcat:7lvz6qi5nzd5tms7j2vwom5n6i