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A note on the Einstein equation in string theory

We show, using purely classical considerations and logical extrapolation of results belonging to point particle theories, that the metric background field in which a string propagates must satisfy an Einstein or an Einstein-like equation. Additionally, there emerge restrictions on the worldsheet curvature, which seems to act as a source for spacetime gravity, even in the absence of other matter fields.

preprint1997arXivOpen access
Sayan Kar
gr-qchep-th
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Sayan Kar

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