2 papers
cond-mat.str-el2026
Anomalous temperature dependence of polaron mobility in a nonlinear double-well potential: unbiased X-propagator approach
Stefano Ragni, Osor S. Barišić, Naoto Nagaosa +1
We develop an unbiased X-propagator method for calculating finite-temperature optical conductivity and dc mobility for arbitrary nonlinear electron-phonon interaction. W…
cond-mat.str-el2026
Polaron formation as the vertex function problem: From Dyck's paths to self-energy Feynman diagrams
Tomislav MiÅ¡kiÄ, Juraj Krsnik, Stefano Ragni +2
We present an iterative method for generating the complete set of self-energy Feynman diagrams at arbitrary order for the single-polaron problem with arbitrary linear coupling to t…