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This exploration uncovers non-perturbative formulation in heterotic perturbative vacua, suggesting implications for superstring theory.
String geometry theory is one of the candidates of the non-perturbative formulation of superstring theory. In this paper, in string geometry theory, we identify perturbative heterotic vacua, which include general heterotic backgrounds. From fluctuations around these vacua, we derive the path-integrals of heterotic perturbative superstrings on the backgrounds up to any order.
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Nagasaki et al. (2025) studied this question.
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