4 citations · 4 across the 4 of their papers we have counts for
7 papers
Remarks on Vafa-Witten theory, or how to sit on a wall
Sergei Alexandrov, Aradhita Chattopadhyaya
We prove three results about refined VW invariants on Hirzebruch surfaces. First, we crucially simplify the modular anomaly equation satisfied by the generating series of t…
Multi-instantons in 2d string theory
Sergei Alexandrov, Rishabh Kaushik
Instanton contributions in 2d string theory are known to include subtle numerical factors closely related to a contour prescription in multi-instanton string amplitudes. Both…
Quantum TBA for refined BPS indices
Sergei Alexandrov, Khalil Bendriss
Refined BPS indices give rise to a quantum Riemann-Hilbert problem that is inherently related to a non-commutative deformation of moduli spaces arising in gauge and string theory c…
Mock modularity at work, or black holes in a forest
Sergei Alexandrov
Mock modular forms, first invented by Ramanujan, provide a beautiful generalization of the usual modular forms. In recent years, it was found that they capture generating functions…
Mock modularity of Calabi-Yau threefolds
Sergei Alexandrov, Khalil Bendriss
Generating functions of D4-D2-D0 BPS indices, appearing in Calabi-Yau compactifications of type IIA string theory and identical to rank 0 Donaldson-Thomas invariants, are…
Instantons in sine-Liouville theory
Sergei Alexandrov, Raghu Mahajan, Ashoke Sen
We compute instanton corrections to the partition function of sine-Liouville (SL) theory, which provides a worldsheet description of two-dimensional string theory in a non-trivial…