- #1
FalseVaccum89
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I was just reading an article on superstringtheory.com in the Black Holes section entitled "Space, Time, and String Theory" when I came across the following predicted reformulation of Einstein's tensor:
The explanation for this was as follows:
My question is this: are those correction terms just really, really small but finite, or are they infintesimal under the "very strict symmetry conditions" described?
The explanation for this was as follows:
Note that string theory does not predict that the Einstein equations are obeyed exactly. Perturbative string theory adds an infinite series of corrections to the Einstein equation. . . So our understanding of spacetime in perturbative string theory is only valid as long as spacetime curvature is small compared to the string scale.
However, when these correction terms become large, there is no spacetime geometry that is guaranteed to describe the result. Only under very strict symmetry conditions, such as unbroken supersymmetry, are there known exact solutions to the spacetime geometry in string theory.
My question is this: are those correction terms just really, really small but finite, or are they infintesimal under the "very strict symmetry conditions" described?