64 citations · 102 across the 16 of their papers we have counts for
23 papers
Detectors in Nonrelativistic Conformal Field Theories
Cyuan-Han Chang, Subham Dutta Chowdhury, Ian Moult +1
Correlations in asymptotic fluxes provide one of the primary experimental means of studying physical systems. In the context of relativistic QFT, the formalization of such experime…
Quantum Critical Solids
Subham Dutta Chowdhury, Leo Radzihovsky, Luca V. Delacrétaz
We study the fate of quantum solids with a vanishing velocity of transverse phonons. Such ``floppy'' solids exhibit a cubic elastic nonlinearity that is relevant in spatial dimensi…
Nonrelativistic Conformal Collider Physics of Multiparticle Point Production
Cyuan-Han Chang, Subham Dutta Chowdhury, Ian Moult +1
We define detector operators in the nonrelativistic conformal field theory describing fermions at unitarity. We reduce the problem of computing the momentum distribution and correl…
Lieb-Robinson causality and non-Fermi liquids
Subham Dutta Chowdhury, Sean A. Hartnoll, Aditya Hebbar
Quantum mechanical lattice models with local, bounded interactions obey Lieb-Robinson causality. We show that this implies a domain of analyticity of the retarded Green's function…
Bootstrapping transport in the Drude-Kadanoff-Martin model
Subham Dutta Chowdhury, Sean A. Hartnoll, Aditya Hebbar +1
The Drude-Kadanoff-Martin model is a simple low energy and long wavelength description of charge transport, parameterised by the current relaxation timescale , charge diffusivit…
Symmetry and causality constraints on Fermi liquids
Luca V. Delacrétaz, Subham Dutta Chowdhury, Umang Mehta
We investigate symmetry and causality constraints on interacting Fermi liquids. Whereas Galilean or Lorentz boost symmetry leads to a well-known constraint on the first Landau para…
Regge constraints on local four-point scattering amplitudes of massive particles with spin
Subham Dutta Chowdhury, Vipul Kumar, Suman Kundu +1
In this work, we classify all the possible local four-point couplings relevant for tree-level flat space scattering of external massive particles of spin one and…
Applied nonrelativistic conformal field theory: scattering-length and effective-range corrections to unnuclear physics
Subham Dutta Chowdhury, Ruchira Mishra, Dam Thanh Son
Due to an accidentally large -wave scattering length, in a relatively wide range of energy, neutrons are approximately described by the nonrelativistic conformal field theory of…
Counting parity-violating local S-matrices
Subham Dutta Chowdhury
Four point tree-level local S-matrices form a module over ring of polynomials of mandelstam invariants s, t and u. The module of local analytic S-matrices can be encoded in terms o…
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…
Bulk locality for scalars and fermions with global symmetry
Subham Dutta Chowdhury, Kausik Ghosh
We count the number of independent solutions to crossing constraints of four point functions involving charged scalars and charged fermions in a CFT with large gap in the spectrum.…
Bounds on Regge growth of flat space scattering from bounds on chaos
Deeksha Chandorkar, Subham Dutta Chowdhury, Suman Kundu +1
We study four-point functions of scalars, conserved currents, and stress tensors in a conformal field theory, generated by a local contact term in the bulk dual description, in two…
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…
Classification of four-point local gluon S-matrices
Subham Dutta Chowdhury, Abhijit Gadde
In this paper, we classify four-point local gluon S-matrices in arbitrary dimensions. This is along the same lines as \cite{Chowdhury:2019kaq} where four-point local photon S-matri…
Classification of all 3 particle S-matrices quadratic in photons or gravitons
Soumangsu Chakraborty, Subham Dutta Chowdhury, Tushar Gopalka +3
We explicitly construct every kinematically allowed three particle graviton-graviton- and photon-photon- S-matrix in every dimension and for every choice of the little group…
Classifying and constraining local four photon and four graviton S-matrices
Subham Dutta Chowdhury, Abhijit Gadde, Tushar Gopalka +3
We study the space of all kinematically allowed four photon and four graviton S-matrices, polynomial in scattering momenta. We demonstrate that this space is the permutation invari…
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…
Bootstrap and collider physics of parity violating conformal field theories in
Subham Dutta Chowdhury, Justin R. David, Shiroman Prakash
We study the crossing equations in for the four point function of two currents and two scalars including the presence of a parity violating term for the -channel st…
Shear sum rule in higher derivative gravity theories
Subham Dutta Chowdhury
We study holographic shear sum rules in Einstein gravity with curvature squared corrections. Sum rules relate weighted integral over spectral densities of retarded correlators in t…
Constraints on parity violating conformal field theories in
Subham Dutta Chowdhury, Justin R. David, Shiroman Prakash
We derive constraints on three-point functions involving the stress tensor, , and a conserved current, , in 2+1 dimensional conformal field theories that violate parit…
Spectral sum rules for conformal field theories in arbitrary dimensions
Subham Dutta Chowdhury, Justin R. David, Shiroman Prakash
We derive spectral sum rules in the shear channel for conformal field theories at finite temperature in general dimensions. The sum rules result from the OPE of the stres…
Global gravitational anomalies and transport
Subham Dutta Chowdhury, Justin R. David
We investigate the constraints imposed by global gravitational anomalies on parity odd induced transport coefficients in even dimensions for theories with chiral fermions, gravitin…
Anomalous transport at weak coupling
Subham Dutta Chowdhury, Justin R. David
We evaluate the contribution of chiral fermions in , chiral bosons, a chiral gravitino like theory in and chiral gravitinos in to all the leading parity odd…