Concept
Espace-temps
Publications associées (32)
An analytical toolkit for the S-matrix bootstrap
Miguel Alexandre Ribeiro Correia, Alexander Zhiboedov, Amit Sever
We revisit analytical methods for constraining the nonperturbative S-matrix of unitary, relativistic, gapped theories in d >= 3 spacetime dimensions. We assume extended analyticity of the two-to-two scattering amplitude and use it together with elastic uni ...
SPRINGER2021Tomographic reconstruction of the runaway distribution function in TCV using multispectral synchrotron images
Basil Duval, Joan Decker, Umar Sheikh, Artur Perek, Gergely Papp
Synchrotron radiation observed in a quiescent Tokamak a Configuration Variable (TCV) runaway discharge is studied using filtered camera images targeting three distinct wavelength intervals. Through the tomographic simultaneous algebraic reconstruction tech ...
IOP PUBLISHING LTD2021On the stress tensor light-ray operator algebra
Grégoire Olivier Mathys, Matthew Thomas Walters, Alexandre Mathieu Frédéric Belin
We study correlation functions involving generalized ANEC operators of the form integral dx-x-n+2T--x -> in four dimensions. We compute two, three, and ...
2021SPHARMA approximations for stationary functional time series on the sphere
In this paper, we focus on isotropic and stationary sphere-cross-time random fields. We first introduce the class of spherical functional autoregressive-moving average processes (SPHARMA), which extend in a natural way the spherical functional autoregressi ...
2021Hamiltonian truncation in Anti-de Sitter spacetime
Kamran Salehi Vaziri, Marco Meineri, Matthijs Jan Hogervorst
Quantum Field Theories (QFTs) in Anti-de Sitter (AdS) spacetime are often strongly coupled when the radius of AdS is large, and few methods are available to study them. In this work, we develop a Hamiltonian truncation method to compute the energy spectrum ...
SPRINGER2021Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography
Gianluca Castignani, Yi Wang, Richard Massey, Fabio Finelli
The analysis of weak gravitational lensing in wide-field imaging surveys is considered to be a major cosmological probe of dark energy. Our capacity to constrain the dark energy equation of state relies on an accurate knowledge of the galaxy mean redshift ...
2021