Extending the Feynman variational principle and analytical methods to lattice polaronsRemoveS. N. Klimin, J. Tempere, M. Houtput, I. Zappacosta, S. Ragni, T. Hahn, L. Celiberti, C. Franchini, and A. S. MishchenkoPhys. Rev. B 113, 245128 (2026)
