Fig. 1
From: Environmental engineering for quantum energy transport
Schematic energy level diagram of our multi-site system illustrates the case of three sites. Each site n has an associated excited state |n〉 with Larmor frequency ωn, and the excited state at each site fluctuates with the frequency fluctuation fn(t) around a fixed level. Each site has a transition frequency Vij between the adjacent sites i = n and j = n + 1. The final site in the chain, i.e., site n = 3 in this illustration, includes a decay channel with rate κ to trap the system in its ground state. This corresponds to the excitation leaving the chain
