4 papers
Positive Geometry of Yang-Mills Correlators
Mattia Arundine, Veronica Calvo Cortes, Joris Koefler +1
We develop a positive-geometric formulation of tree-level Yang-Mills correlators in de Sitter space at three and four points through their helicity-stripped representatives on the…
Cosmological Collider in the Grassmannian
Mattia Arundine, Guilherme L. Pimentel
We revisit the computation of four-point wavefunction coefficients and correlators for external conformally coupled scalars exchanging a particle of generic mass and spin. Much of…
The Cosmological Grassmannian
Mattia Arundine, Daniel Baumann, Mang Hei Gordon Lee +2
We introduce the orthogonal Grassmannian as a novel kinematic space for describing correlators of massless spinning fields in de Sitter space. By automatically encoding the constra…
The DSSYK Model: Charge and Holography
Mattia Arundine
The Anti-de Sitter/Conformal Field Theory correspondence (AdS/CFT) is one of the most significant findings in theoretical physics and forms the basis of this thesis. Although highl…