Renormalization method of nonequilibrium critical dynamics. Universal Fluctuation-Dissipation Ratio is computed up to the second-loop order
Renormalization method is applied to relaxation dynamics of non-equilibrium Model A quenched to the critical point from high-temperature initial state. Violations of Fluctuation-Dissipation Theorem and two-time dependences of response and correlation functions are investigated. Universal Fluctuation-Dissipation Ratio is computed up to the second-loop order at the fixed spatial dimension d = 3. The summation Pade - Borel method is applied for calculation of limit Fluctuation-Dissipation Ratio.