On the eigenvalues of the lattice spin-boson model with at most one photonElyor B. Dilmurodov, Bekzod I. Bahronov, Khilola G. Khayitova, Gulomjon G. Kurbonov and Rustam T. NorchayevE3S Web Conf., 587 (2024) 01002DOI: https://doi.org/10.1051/e3sconf/202458701002