Results 71 to 80 of about 225,577 (311)

Worldline geometries for scattering amplitudes

Journal of High Energy Physics
In this paper, we construct the path integral for infinite and semi-infinite scalar worldlines. We show that, at the asymptotic endpoints, on-shell physical states can be generated by inserting vertex operators at infinity.
Roberto Bonezzi, Maria Foteini Kallimani
doaj   +1 more source

Infinities within graviton scattering amplitudes

, 1995
We present unitarity as a method for determining the infinities present in graviton scattering amplitudes. The infinities are a combination of IR and UV. By understanding the soft singularities we may extract the UV infinities and relate these to counter-
't Hooft G, 't Hooft G, 't Hooft G, Aeppli A, Berends F A, Constanti V, Cutkosky R E, David C Dunbar, DeTollis B, DeWitt B S, Dixon L, Fradkin E S, Fradkin E S, Gastmans R, Goroff M H, Grisaru M T, Gunion J F, Jack I, Melrose D B, Norridge P S, Novaes S F, Paul S Norridge, Siegel W, van Neerven W, van Oldenborgh G J, van Oldenborgh G J, Veltman M, Weinberg S   +27 more
core   +1 more source

Synchrotron Radiation for Quantum Technology

Advanced Functional Materials, EarlyView.
Materials and interfaces underpin quantum technologies, with synchrotron and FEL methods key to understanding and optimizing them. Advances span superconducting and semiconducting qubits, 2D materials, and topological systems, where strain, defects, and interfaces govern performance.
Oliver Rader, Sakura Pascarelli, Klaus Attenkofer, Anna A. Makarova, Karsten Holldack, Kai Rossnagel, Kristiaan Temst, George Kourousias, Stefano Carretta, Caterina Biscari, Helmut Dosch   +10 more
wiley   +1 more source

Analytical amplitudes from numerical solutions of the scattering equations

Journal of High Energy Physics, 2020
The CHY formalism for massless scattering provides a cohesive framework for the computation of scattering amplitudes in a variety of theories. It is especially compelling because it elucidates existing relations among theories which are seemingly ...
Giuseppe De Laurentis
doaj   +1 more source

Long String Scattering in c = 1 String Theory

, 2018
We study the scattering of long strings in c = 1 string theory, both in the worldsheet description and in the non-singlet sector of the dual matrix quantum mechanics. From the worldsheet perspective, the scattering amplitudes of long strings are obtained
Balthazar, Bruno, Rodriguez, Victor A., Yin, Xi   +2 more
core   +1 more source

Cluster polylogarithms for scattering amplitudes [PDF]

Journal of Physics A: Mathematical and Theoretical, 2014
Motivated by the cluster structure of two-loop scattering amplitudes in N=4 Yang-Mills theory we define "cluster polylogarithm functions". We find that all such functions of weight 4 are made up of a single simple building block associated to the A_2 cluster algebra.
Golden, John, Paulos, Miguel F., Spradlin, Marcus, Volovich, Anastasia   +3 more
openaire   +2 more sources

Fractional Skyrmion Tubes in Chiral‐Interfaced 3D Magnetic Nanowires

Advanced Functional Materials, EarlyView.
In chiral 3D helical magnetic nanowires, the coupling between the geometric and magnetic chirality provides a way to create topological spin states like vortex tubes. Here, it is demonstrated how the breaking of this coupling in interfaced 3D nanowires of opposite chirality leads to even more complex topological spin states, such as fractional ...
John Fullerton, Naëmi Leo, Jakub Jurczyk, Claire Donnelly, Dédalo Sanz‐Hernández, Luka Skoric, Nicholas Mille, Stefan Stanescu, Donald A MacLaren, Rachid Belkhou, Aurelio Hierro‐Rodriguez, Amalio Fernández‐Pacheco   +11 more
wiley   +1 more source

Einstein-Yang-Mills Scattering Amplitudes From Scattering Equations

, 2014
We present the building blocks that can be combined to produce tree-level S-matrix elements of a variety of theories with various spins mixed in arbitrary dimensions.
Cachazo, Freddy, He, Song, Yuan, Ellis Ye   +2 more
core   +1 more source

Mathematical Aspects of Scattering Amplitudes [PDF]

Journeys Through the Precision Frontier: Amplitudes for Colliders, 2015
In these lectures we discuss some of the mathematical structures that appear when computing multi-loop Feynman integrals. We focus on a specific class of special functions, the so-called multiple polylogarithms, and discuss introduce their Hopf algebra structure.
openaire   +2 more sources

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

Advanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan, Marie Le Pivert, Alireza Ranjbari, Diana Dragoe, Daniel Bahena‐Uribe, Christophe Colbeau‐Justin, Christian Herrero, Dorota Rutkowska‐Zbik, Johnny Deschamps, Hynd Remita   +9 more
wiley   +1 more source