Paper
Gravitational instantons from closed superstring field theory
Authors
Ivo Sachs, Xianghang Zhang
Abstract
We test exact marginality of the deformation describing the resolution of a $\mathbb{Z}_2$ orbifold by analyzing the closed superstring equations of motion to third order in the size, including $α'$ 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.
Metadata
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Raw Data (Debug)
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"raw_xml": "<entry>\n <id>http://arxiv.org/abs/2603.04953v1</id>\n <title>Gravitational instantons from closed superstring field theory</title>\n <updated>2026-03-05T08:46:26Z</updated>\n <link href='https://arxiv.org/abs/2603.04953v1' rel='alternate' type='text/html'/>\n <link href='https://arxiv.org/pdf/2603.04953v1' rel='related' title='pdf' type='application/pdf'/>\n <summary>We test exact marginality of the deformation describing the resolution of a $\\mathbb{Z}_2$ orbifold by analyzing the closed superstring equations of motion to third order in the size, including $α'$ 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.</summary>\n <category scheme='http://arxiv.org/schemas/atom' term='hep-th'/>\n <published>2026-03-05T08:46:26Z</published>\n <arxiv:comment>21 pages; partially based on the master's thesis of one of the authors</arxiv:comment>\n <arxiv:primary_category term='hep-th'/>\n <author>\n <name>Ivo Sachs</name>\n </author>\n <author>\n <name>Xianghang Zhang</name>\n </author>\n </entry>"
}