Article
Physics, Particles & Fields
Soner Albayrak, Savan Kharel, David Meltzer
Summary: We explore the color-kinematic duality for tree-level AdS/CFT correlators in momentum space, finding that it does not provide additional relations among n-point, color-ordered correlators for the integrated correlator, but naturally relates the bi-adjoint theory and Yang-Mills theory in AdS(d+1) for the AdS integrand.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Agnese Bissi, Giulia Fardelli, Alessandro Georgoudis
Summary: A set of structures appearing in the four-point function of protected operators in N = 4 super Yang-Mills with SU(N) gauge group was computed at any order in a large N expansion, determined solely by leading order CFT data. By focusing on a specific limit, a connection was made with the dual supergravity amplitude in flat space, where these structures correspond to iterated s-cuts. Several checks were performed and it was conjectured that the same interpretation holds for supergravity amplitudes on AdS(5) x S-5.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Review
Physics, Multidisciplinary
Daniele Dorigoni, Michael B. Green, Congkao Wen
Summary: This article reviews some results of the SAGEX programme, focusing on the interplay of supersymmetry and modular covariance of scattering amplitudes in type IIB superstring theory and N = 4 supersymmetric Yang-Mills theory. The article discusses the determination of exact expressions for BPS interactions, properties of integrated correlators, and modular graph functions.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Physics, Particles & Fields
Luis F. Alday, Agnese Bissi, Xinan Zhou
Summary: This paper initiates the study of one-loop gluon amplitudes in AdS space. The one-loop correction to the massless gluon amplitude on AdS(5) x S-3 is computed, and the differences from flat space are discussed.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Congkao Wen, Shun-Qing Zhang
Summary: A compact formula in Mellin space for the four-point tree-level holographic correlators of chiral primary operators with arbitrary conformal weights in (2, 0) supergravity on AdS(3)x S-3 is presented. This formula is obtained by solving the recursion relation from a hidden six-dimensional conformal symmetry, after carefully analyzing the analytic structures of the correlators. Various limits of the correlators are studied, including the maximally R-symmetry violating limit and flat-space limit.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Simon Caron-Huot, Yue-Zhou Li
Summary: Three-point correlators of spinning operators in three dimensions have multiple tensor structures compatible with conformal symmetry. Helicity commutes with conformal transformations for conserved currents, allowing for the construction of three-point structures that diagonalize helicity. Using the Lorentzian inversion formula, anomalous dimensions for conserved currents at bulk tree-level order are obtained and compared with flat-space gluon scattering amplitudes.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Luis F. Alday, Connor Behan, Pietro Ferrero, Xinan Zhou
Summary: This study systematically investigates holographic correlators in a variety of SCFTs with non-maximal superconformal symmetry. By considering current multiplets and their generalizations with higher weights, the correspondence between massless and massive super gluons in the bulk is explored. At leading order, tree-level gluon scattering amplitudes in AdS are found to be fixed by symmetries and consistency conditions in all the theories studied, revealing interesting emergent structures such as dimensional reductions, hidden conformal symmetry, and an AdS version of the color-kinematic duality.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Luis F. Alday
Summary: This study focuses on non-planar correlators in N = 4 super-Yang-Mills in Mellin space, particularly examining the stress tensor four-point correlator in terms of 1/N-4 order and strong coupling expansion. The results show that both the loop supergravity result and stringy corrections have a remarkably simple structure in Mellin space, demonstrating important properties such as the correct flat space limit and the structure of UV divergences.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Qiang Wen
Summary: In this article, we introduce a new information theoretical quantity called balanced partial entanglement (BPE) for any bipartite mixed state. We discuss its relation with purifications and find that in holographic CFT2, BPE equals the area of the entanglement wedge cross section divided by 4G.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Hare Krishna, D. Rodriguez-Gomez
Summary: In this study, 2-point correlation functions for scalar operators in position space are examined using holography, with a focus on operators with large conformal dimensions. The geodesic approximation is utilized for propagators. In addition to the main contribution, a correction involving bulk cubic couplings and higher curvature couplings is identified, which provides insight into the interior of a black hole.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Alex May, Mark Van Raamsdonk
Summary: The paper explains approximating states of a holographic CFT by states of non-interacting BCFTs and reintroducing couplings to make wormholes traversable, creating an intermediate class of geometries.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Yi-Yu Lin, Jia-Rui Sun, Jun Zhang
Summary: In this study, the partial entanglement entropy is explicitly interpreted as component flow flux in a locking bit thread configuration within the holographic framework. By applying the locking theorem of bit threads, a set of uniquely determined component flow fluxes is obtained, and the PEE proposal and its generalized version in multipartite cases are successfully derived. Furthermore, a coherent explanation is presented for the coincidence between the BPE/EWCS duality and the EoP/EWCS duality, based on the perspective of bit threads.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Arjun Bagchi, Prateksh Dhivakar, Sudipta Dutta
Summary: In this paper, we generalize the flat space limit of AdS by considering the previously ignored null direction, thereby reproducing Carrollian CFT correlation functions from AdS Witten diagrams. Specifically, we reproduce two and three-point correlation functions for three dimensional Carrollian CFTs in the delta-function branch by considering Witten diagrams in AdS(4). Along the way, we construct non-trivial Carrollian three-point functions in the delta-branch by considering a collinear limit and obtain a generalized anti-podal matching condition dependent on the retarded time direction.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Andreas Karch, Zhu-Xi Luo, Hao-Yu Sun
Summary: This study explores entanglement entropy in 1+1 dimensional conformal field theories with interfaces from a holographic perspective, revealing that the location of the interface can affect the entanglement entropy, showing new patterns and universal relationships.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Mohsen Alishahiha, Amin Faraji Astaneh, Ali Naseh
Summary: By employing the extended island formula, we computed the entanglement entropy of Hawking radiation for black hole solutions of certain gravitational models containing higher derivative terms. Our results showed that despite the non-unitarity of the corresponding gravitational models, the entropy followed the Page curve, thanks to the contribution of the island.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Soner Albayrak, Chandramouli Chowdhury, Savan Kharel
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Soner Albayrak, Savan Kharel
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Soner Albayrak, David Meltzer, David Poland
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Particles & Fields
Soner Albayrak, Savan Kharel, David Meltzer
Summary: We explore the color-kinematic duality for tree-level AdS/CFT correlators in momentum space, finding that it does not provide additional relations among n-point, color-ordered correlators for the integrated correlator, but naturally relates the bi-adjoint theory and Yang-Mills theory in AdS(d+1) for the AdS integrand.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Soner Albayrak, Savan Kharel
Summary: This paper presents a calculation of the four gravitons amplitude in (Anti)-de Sitter space, focusing specifically on external gravitons with positive helicity. The authors employ a generalized recursion method that involves complexifying all external momentum of the graviton function, resulting in the factorization of AdS graviton amplitudes and eliminating the need for Feynman-Witten diagrams. The calculations were conducted in three boundary dimensions, with emphasis on exploring cosmology and aiding the cosmological bootstrap program.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Soner Albayrak, Rajeev S. Erramilli, Zhijin Li, David Poland, Yuan Xin
Summary: We present the results of a conformal bootstrap study on the presumed unitary IR fixed point of quantum electrodynamics in three dimensions coupled to Nf = 4 two-component Dirac fermions. The study finds that the scaling dimensions of the fermion bilinear r and the monopole M1/2 are constrained into a closed island, consistent with 1/Nf perturbative results.
Article
Astronomy & Astrophysics
Soner Albayrak, Savan Kharel
Summary: In this study, AdS(d+1) loop amplitudes for gluons and gravitons were systematically investigated using momentum space techniques. A differential operator was constructed to generate loop integrands for gluon and graviton loops, systematizing the computation for any given loop level Witten diagram. A general prescription was provided in this formalism, and it was discussed for bubble, triangle, and box diagrams.
Article
Astronomy & Astrophysics
Soner Albayrak, Chandramouli Chowdhury, Savan Kharel
Article
Astronomy & Astrophysics
Soner Albayrak, Chandramouli Chowdhury, Savan Kharel