64 citations · 192 across the 8 of their papers we have counts for
8 papers
Explorations in the Space of S-Matrices
Parthiv Haldar
S-matrix is one of the fundamental observables of the quantum theory of relativistic particles. There have been attempts to understand the quantum dynamics of relativistic particle…
Locality and Analyticity of the Crossing Symmetric Dispersion Relation
Debapriyo Chowdhury, Parthiv Haldar, Ahmadullah Zahed
This paper discusses the locality and analyticity of the crossing symmetric dispersion relation (CSDR). Imposing locality constraints on the CSDR gives rise to a local and fully cr…
Crossing Symmetric Spinning S-matrix Bootstrap: EFT bounds
Subham Dutta Chowdhury, Kausik Ghosh, Parthiv Haldar +2
We develop crossing symmetric dispersion relations for describing 2-2 scattering of identical external particles carrying spin. This enables us to import techniques from Geometric…
Quantum field theory and the Bieberbach conjecture
Parthiv Haldar, Aninda Sinha, Ahmadullah Zahed
An intriguing correspondence between ingredients in geometric function theory related to the famous Bieberbach conjecture (de Branges' theorem) and the non-perturbative crossing sy…
Regge amplitudes in Generalized Fishnet and Chiral Fishnet Theories
Subham Dutta Chowdhury, Parthiv Haldar, Kallol Sen
We extend the analysis of \cite{Chowdhury:2019hns} to study the Regge trajectories of the Mellin amplitudes of the and magnon correlators of the generalized Fishnet theor…
Relative entropy in scattering and the S-matrix bootstrap
Anjishnu Bose, Parthiv Haldar, Aninda Sinha +2
We consider entanglement measures in 2-2 scattering in quantum field theories, focusing on relative entropy which distinguishes two different density matrices. Relative entropy is…
Froissart bound for/from CFT Mellin amplitudes
Parthiv Haldar, Aninda Sinha
We derive bounds analogous to the Froissart bound for the absorptive part of CFT Mellin amplitudes. Invoking the AdS/CFT correspondence, these amplitudes correspond to scatteri…
On the Regge limit of Fishnet correlators
Subham Dutta Chowdhury, Parthiv Haldar, Kallol Sen
We study the Regge trajectories of the Mellin amplitudes of the and magnon correlators of the Fishnet theory. Since fishnet theory is both integrable and conformal, th…