Figure 6

Time evolution of χ for a non-complete random graph for 5 qubits and fixed \(\tau =0.5\). All five qubits are coupled to the environment with the same strength, hence all \(\kappa _{i}\) are equal to κ. The gray dashed line shows the probability expected for the final ground state in thermal equilibrium. The coloured solid lines are for non-optimized open systems with \(0.001 \le \kappa \le 0.007\). The top solid black line is for the optimised system while the bottom solid black line corresponds to an isolated system