Quantum correlations of the photon fields in a waveguide quantum electrodynamicsYa. S. Greenberg, O. A. Chuikin, A. G. Moiseev, A. A. Shtygashev and O. V. KibisEur. Phys. J. B, 98 8 (2025) 170DOI: https://doi.org/10.1140/epjb/s10051-025-01020-2