90 citations · 381 across the 16 of their papers we have counts for
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Cosmological Correlators from Scattering Amplitudes: A Review
Soner Albayrak, Savan Kharel
The primordial statistics underlying the CMB and large-scale structure are encoded in late-time cosmological correlation functions (constructed from the coefficients of the wavefun…
Magic without a phase: phase-independent stabilizer Rényi entropy in gluon scattering
Jinwei Chu, Savan Kharel
Magic, also known as non-stabilizerness, measures the usefulness of a quantum state for quantum computation. While magic is defined relative to a choice of computational basis, in…
Soft limits of gluon amplitudes in holography and cosmology
Soner Albayrak, Savan Kharel
In this work, we extend the study of soft limits to (Anti) de Sitter spaces, investigating the analytic structure of holographic gluon correlators as part of a broader effort to re…
Towards the Feynman rule for -point gluon Mellin amplitudes in AdS/CFT
Jinwei Chu, Savan Kharel
We investigate the embedding formalism in conjunction with the Mellin transform to determine tree-level gluon amplitudes in AdS/CFT. Detailed computations of three to five-point co…
Momentum-space formulae for AdS correlators for diverse theories in diverse dimensions
Soner Albayrak, Savan Kharel, Xinkang Wang
In this paper, we explore correlators of a series of theories in anti-de Sitter space: we present comprehensive results for interactions involving scalars, gluons, and gravitons in…
Mellin Amplitude for -Gluon Scattering in Anti-de Sitter
Jinwei Chu, Savan Kharel
In AdS/CFT, we introduce a robust method for computing -point gluon Mellin amplitudes, applicable in various spacetime dimensions. Using the Mellin transform and a recursive alg…
All plus four point (A)dS graviton function using generalized on-shell recursion relation
Soner Albayrak, Savan Kharel
This paper presents a calculation of the four gravitons amplitude in (Anti)-de Sitter space, focusing specifically on external gravitons with positive helicity. To achieve this, we…
On duality of color and kinematics in (A)dS momentum space
Soner Albayrak, Savan Kharel, David Meltzer
We explore color-kinematic duality for tree-level AdS/CFT correlators in momentum space. We start by studying the bi-adjoint scalar in AdS at tree-level as an illustrative example.…
On loop celestial amplitudes for gauge theory and gravity
Soner Albayrak, Chandramouli Chowdhury, Savan Kharel
Scattering amplitudes of massless particles in Minkowski space can be expressed in a conformal basis by Mellin transforming the momentum space amplitudes to correlation functions o…
On spinning loop amplitudes in Anti-de Sitter space
Soner Albayrak, Savan Kharel
In this work we present a systematic study of AdS loop amplitudes for gluons and gravitons using momentum space techniques. Inspired by the recent progress in tree level co…
An étude of momentum space scalar amplitudes in AdS
Soner Albayrak, Chandramouli Chowdhury, Savan Kharel
In this paper, we explore momentum space approach to computing scalar amplitudes in Anti-de Sitter space. We show that the algorithm derived by Arkani-Hamed, Benincasa, and Postnik…
Towards the higher point holographic momentum space amplitudes II: Gravitons
Soner Albayrak, Savan Kharel
In this follow up paper, we calculate higher point tree level graviton Witten diagrams in AdS via bulk perturbation theory. We show that by rearranging the bulk to bulk gravito…
New relation for AdS amplitudes
Soner Albayrak, Chandramouli Chowdhury, Savan Kharel
In this paper, we present a simple and iterative algorithm that computes Anti-de Sitter space scattering amplitudes. We focus on the vector correlators in AdS in four dimensions in…
Towards the higher point holographic momentum space amplitudes
Soner Albayrak, Savan Kharel
In this paper, we calculate higher point tree level vector amplitudes propagating in AdS. We use bulk perturbation theory to compute tree level Witten diagrams. We show that wh…
Tree-level Correlators of scalar and vector fields in AdS/CFT
Savan Kharel, George Siopsis
Extending earlier results by Paulos, we discuss further the use of the embedding formalism and Mellin transform in the calculation of tree-level correlators of scalar and vector fi…
Gauge theory one-loop amplitudes and the BCFW recursion relations
Savan Kharel, George Siopsis
We calculate gauge theory one-loop amplitudes with the aid of the complex shift used in the Britto-Cachazo-Feng-Witten (BCFW) recursion relations of tree amplitudes. We apply the s…