Dynamics of quantum Fisher information in a two-level system coupled to multiple bosonic reservoirs*
Wang Guo-Youa),b), Guo You-Nengc), Zeng Kec)
       
QFI as a function of λ t with the optimal input state in the weak coupling regime γ = 5 λ /12 for different numbers of reservoirs N : (a) N = 1, (b) N = 2, (c) N = 4, (d) N = 20.