Magnetic Confinement and Screening Masses

Confined and deconfined phases are defined through nonperturbative correlators and nonperturbative background perturbation theory is used to compute the critical temperature $T_c$ and spatial string tension. Taking evolution along one of the spatial axes the set of Hamiltonians $H(n_1,n_2)$ with different Matsubara frequencies is obtained. Meson and glueball screening masses and wave functions are computed for $H(0,0)$ and compared with available lattice data.