5 papers
Finite-temperature Green's function cluster expansion from thermofield doubles: Breakdown of the polaron picture
M. R. Carbone, S. Fomichev, B. Kloss +4
We introduce a method, numerically exact in principle, for computing the momentum- and frequency-resolved single-particle Green's function of a polaron at finite temperature. The m…
Self-consistent GW theory for superconductivity in SrTiO3 models
Zhi-Hao Cui, John Sous, Andrew J. Millis +1
Superconductivity in doped SrTiO occurs over a wide range of carrier densities, including those for which the Fermi energy is below the polar longitudinal optical phonon scale.…
Asymmetric Scaling Laws from Sparse Features
John Sous, Michael Winer
We introduce a model for neural scaling laws under sparse activations. In the model, test loss is often dominated by rare coordinates that are never observed in the training input.…
Bipolaronic High-Temperature Superconductivity from Phonon-Modulated Hopping: A Perspective
John Sous
Phonon-mediated superconductivity is conventionally thought to be capped at a transition temperature no larger than roughly one-tenth of the phonon frequency ,…
Ultrafast electronic coherence from slow phonons
Mattia Moroder, Sebastian Paeckel, Matteo Mitrano +1
Light offers a route to engineer new phases of matter far from equilibrium, including transient states suggestive of superconducting, charge-ordered, and excitonic ordering behavio…