Modular bootstrap for compact Calabi-Yau threefolds

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• Sergei Alexandrov (Université de Montpellier)
• Wednesday 04 October 2023, 09:30-10:30
• Seminar Room 1, Newton Institute.

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BLHW01 - Number theory, machine learning and quantum black holes

BPS indices encoding entropy of supersymmetric black holes in compactifications of Type II string theory on compact Calabi-Yau threefolds coincide with generalized Donaldson-Thomas invariants whose computation represents an outstanding problem. I’ll show how this problem can be solved for a set of one-parameter threefolds by combining a direct integration of topological string, modular properties of rank 0 DT invariants counting D4-D2-D0 BPS states, and wall-crossing relations between rank 1 and rank 0 DT invariants. In particular, one obtains explicit (mock) modular functions encoding infinite sets of D4-D2-D0 BPS indices and new boundary conditions for the holomorphic anomaly equation allowing to overcome the limitations of the direct integration method.

This talk is part of the Isaac Newton Institute Seminar Series series.

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