Transient behaviour of thermal noises. Time dependent behaviors of σxx (red), σvv (blue), and σxv (green) for b = 1.0 and q = 1.0 (curves a to c). T is the period corresponding to the driving frequency of T = 2π /Ω. σxx0, σvv0, and σxv0 are defined as (2veq/Ω)2,, and , respectively. Magnified figure for 6T <t < 8T (curves d to f).