Figure 2
From: Well-protected quantum state transfer in a dissipative spin chain

(a) Fidelity and (b) maximum average fidelity of the state transfer for the protected (N = 50) and unprotected (N = 1) two-qubit spin chain contained in the Lorentzian reservoir. The related parameters are λ = 50 (in units of γ0) and ω0 = 1 (in units of γ0). As illustrated in text, N = 50 means that there are 49 similar auxiliary chains in the reservoir for the aim of protection process.