Gravitational instantons from closed superstring field theory
arXiv:2603.04953
Abstract
We test exact marginality of the deformation describing the resolution of a orbifold by analyzing the closed superstring equations of motion to third order in the size, including corrections. We find that the third order correction is unobstructed for all deformation moduli. We are also able to reproduce the Eguchi-Hanson gravitational instanton up to the second order in the field theory limit with a suitable choice of moduli.
21 pages; partially based on the master's thesis of one of the authors