activity
19982026
most citedR^4, purified

122 citations · 520 across the 20 of their papers we have counts for

collaborators

20 papers

hep-th2026

Decoding multiway gravitational junctions in AdS in terms of holographic quantum maps

Avik Chakraborty, Tanay Kibe, Martín Molina +2

It has been shown that multiway junctions gluing copies of locally AdS spacetimes () can be described by strings obeying non-linear Nambu-Goto equations coup…

hep-th2009★ 28 cited

A note on the quartic effective action of type IIB superstring

Giuseppe Policastro, Dimitrios Tsimpis

We recast the result of our recent computation of the quartic action of ten-dimensional IIB supergravity in a manifestly SL(2,R)-covariant form. This affords us a critical assessme…

hep-th2007★ 15 cited

Partition Functions, Localization, and the Chiral de Rham complex

Pietro Antonio Grassi, Giuseppe Policastro, Emanuel Scheidegger

We propose a localization formula for the chiral de Rham complex generalizing the well-known localization procedure in topological theories. Our formula takes into account the cont…

hep-th2006★ 122 cited

R^4, purified

Giuseppe Policastro, Dimitrios Tsimpis

We derive, using the pure-spinor formalism, the complete -- including the fermions -- four-point effective action of both type II superstrings to all orders in , at tree level…

hep-th2006★ 8 cited

Curved Beta-Gamma Systems and Quantum Koszul Resolution

P. A. Grassi, G. Policastro

We consider the partition function of beta-gamma systems in curved space of the type discussed by Nekrasov and Witten. We show how the Koszul resolution theorem can be applied to t…

hep-th2005

Twistor Spaces, Mirror Symmetry and Self-dual Kahler Manifolds

Giuseppe Policastro

We present the evidence for two conjectures related to the twistor string. The first conjecture states that two super-Calabi Yaus -- the supertwistor space and the superambitwistor…