181 citations · 637 across the 15 of their papers we have counts for
15 papers
Aspects of Witten Diagrams for Holographic Defects
Dean Carmi, Sudip Ghosh, Trakshu Sharma
In this paper, we study the conformal block decomposition of Witten diagrams for -dimensional holographic CFTs in the presence of a -dimensional conformal defect. The hologra…
Celestial insights into the S-matrix bootstrap
Sudip Ghosh, Prashanth Raman, Aninda Sinha
We consider 2-2 scattering in four spacetime dimensions in Celestial variables. Using the crossing symmetric dispersion relation (CSDR), we recast the Celestial amplitudes in terms…
(Chiral) Virasoro invariance of the tree-level MHV graviton scattering amplitudes
Shamik Banerjee, Sudip Ghosh, Partha Paul
In this paper we continue our study of the tree level MHV graviton scattering amplitudes from the point of view of celestial holography. In arXiv:2008.04330 we showed that the cele…
Subsubleading soft graviton symmetry and MHV graviton scattering amplitudes
Shamik Banerjee, Sudip Ghosh, Sai Satyam Samal
In arXiv:2008.04330 it was shown that supertranslation and current algebra symmetries, corresponding to leading and subleading soft graviton theorems,…
MHV Gluon Scattering Amplitudes from Celestial Current Algebras
Shamik Banerjee, Sudip Ghosh
We show that the Mellin transform of an -point tree level MHV gluon scattering amplitude, also known as the celestial amplitude in pure Yang-Mills theory, satisfies a system of…
MHV Graviton Scattering Amplitudes and Current Algebra on the Celestial Sphere
Shamik Banerjee, Sudip Ghosh, Partha Paul
The Cachazo-Strominger subleading soft graviton theorem for a positive helicity soft graviton is equivalent to the Ward identities for currents. This n…
BMS Symmetry of Celestial OPE
Shamik Banerjee, Sudip Ghosh, Riccardo Gonzo
In this paper we study the BMS symmetry of the celestial OPE of two positive helicity gravitons in Einstein theory in four dimensions. The celestial OPE is obtained by Mellin trans…
Thermal Correlators and Bosonization Dualities in Large Chern Simons Matter Theories
Sudip Ghosh, Subhajit Mazumdar
We consider -dimensional conformal field theories with Chern Simons gauge fields coupled to bosonic and fermionic matter fields transforming in the fundamental represen…
Modified celestial amplitude in Einstein gravity
Shamik Banerjee, Sudip Ghosh, Pranjal Pandey +1
In this paper we evaluate the modified celestial amplitude for gravitons and gluons, as defined in arXiv:1801.10171[hep-th]. We find that the modified (tree) amplitude is finite fo…
Quantum information measures for restricted sets of observables
Sudip Ghosh, Suvrat Raju
We study measures of quantum information when the space spanned by the set of accessible observables is not closed under products, i.e., we consider systems where an observer may b…
Loss of locality in gravitational correlators with a large number of insertions
Sudip Ghosh, Suvrat Raju
We review lessons from the AdS/CFT correspondence that indicate that the emergence of locality in quantum gravity is contingent on considering observables with a small number of in…
Implications of the AdS/CFT Correspondence on Spacetime and Worldsheet OPE Coefficients
Sudip Ghosh, Sourav Sarkar, Mritunjay Verma
We explore the connection between the operator product expansion (OPE) in the boundary and worldsheet conformal field theories in the context of AdS/CFT correspondence.…
The Breakdown of String Perturbation Theory for Many External Particles
Sudip Ghosh, Suvrat Raju
We consider massless string scattering amplitudes in a limit where the number of external particles becomes very large, while the energy of each particle remains small. Using the g…
-Expansion in the Gross-Neveu Model from Conformal Field Theory
Sudip Ghosh, Rajesh Kumar Gupta, Kasi Jaswin +1
We compute the anomalous dimensions of a class of operators of the form and to leading order in in the Gross-Neveu model in dimensions. We use…
On The Entanglement Entropy For Gauge Theories
Sudip Ghosh, Ronak M. Soni, Sandip P. Trivedi
We propose a definition for the entanglement entropy of a gauge theory on a spatial lattice. Our definition applies to any subset of links in the lattice, and is valid for both Abe…