5 papers
The Phases of the Scalar S-Matrix Island
Joan Elias Miro, Andrea Guerrieri, Mehmet Asim Gumus
The two-to-two four-dimensional scattering amplitude of identical scalars obeys rigorous two-sided non-perturbative bounds derived via the modern numerical S-matrix bootstrap. Thes…
Thermodynamics from the S-matrix reloaded: emergent thermal mass
Pietro Baratella, Joan Elias Miro
The formalism of Dashen, Ma and Bernstein (DMB) expresses the thermal partition function of a system in terms of the S-matrix operator, roughly $Z(β) \propto \int dE\, e^{-βE}\,\…
A Geometric View on Crossing-Symmetric Dispersion Relations
Joan Elias Miro, Andrea Guerrieri, Mehmet Asim Gumus +1
We introduce a general framework for constructing dispersion relations using crossing-symmetric variables, leading to infinitely many distinct representations of the 2-to-2 scatter…
Flowing from the Ising Model on the Fuzzy Sphere to the 3D Lee-Yang CFT
Joan Elias Miro, Olivier Delouche
We employ the Fuzzy Sphere regulator to study the 3D Lee-Yang CFT. The model is defined by deforming the Ising model on the Fuzzy Sphere via a purely imaginary longitudinal magneti…
Testing the RG-flow with Hamiltonian Truncation
Olivier Delouche, Joan Elias Miro, James Ingoldby
Hamiltonian Truncation (HT) methods provide a powerful numerical approach for investigating strongly coupled QFTs. In this work, we develop HT techniques to analyse a specific Reno…