Figure 2
From: Disorder-assisted quantum transport in suboptimal decoherence regimes
Transport efficiency η as a function of the disorder parameter δϵ and dephasing rate γϕ, in the binary tree with 5 generations.
We consider as initial condition a statistical mixture at the leaves of the tree and trapping at the root. The efficiency at each point is averaged over 100 random configurations for the site energies, where each site energy is sampled from a normal distribution with mean 0 and standard deviation δϵ. We observe a large optimality region around γϕ ≈ 1. Below this region, we see that disorder improves significantly the transport efficiency until δϵ ≈ 1. All units are given in terms of the nearest neighbour coupling V.
