7 papers
Les Houches lectures on Spinfoam Path Integrals
Oleksandra Hrytseniak, Etera R. Livine, Valentine Maris
In these lecture notes for the Les Houches School on Loop Quantum Gravity 2025, which took place in September 2025, we give a pedagogical review of the basics of the spinfoam frame…
Elementary blocks of Loop Quantum Gravity
Mehdi Assanioussi, Etera R. Livine
We embark on the vast program of integrating the dynamics of Loop Quantum Gravity (LQG). Adopting the strategy of decomposing spin network states into small blocks of (quantum) geo…
Symmetries of cosmological perturbations: The residual low-multipole ambiguity
Jibril Ben Achour, Etera Livine, Vincent Vennin
In cosmology, long-wavelength modes are related to large-gauge transformations (LGT), i.e. changes of coordinates that modify the physical geometry of the cosmological patch. These…
Effective Dynamics of Spherically Symmetric Static Spacetime
Etera R. Livine, Yuki Yokokura
In general relativity, the Einstein equations provide spherically symmetric static spacetimes with dynamics defined as an evolution along the radial coordinate . The geometrical…
Test-Field vs Physical Quasi-Normal Modes in Scalar-Tensor Theories
Alexandre Arbey, Etera R. Livine, Clara Montagnon
In the context of the general effort to model black hole dynamics, and in particular their return-to-equilibrium through quasi-normal modes, it is crucial to understand how much te…
Geometric Formula for 2d Ising Zeros: Examples & Numerics
Iñaki Garay, Etera R. Livine
A geometric formula for the zeros of the partition function of the inhomogeneous 2d Ising model was recently proposed in terms of the angles of 2d triangulations embedded in the fl…