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cond-mat.str-el2026
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…
cond-mat.supr-con2026
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.…
cond-mat.str-el2026★ 1 cited
Study of the triangular-lattice Hubbard model with constrained-path quantum Monte Carlo
Shu Fay Ung, Ankit Mahajan, David R. Reichman
We benchmark constrained-path Monte Carlo (CPMC) on the triangular-lattice Hubbard model for several fillings and values and show that symmetry-adapted trial wave functions sub…