Figure 5

Concurrence density. Concurrence density through the chain between the initially excited nanomechanical resonator (the central nanomechanical resonator) and all the others with \(\Delta/J=0\) (ballistic expansion). Upper panel: Closed system characterized by \(\gamma=0\) and \(T=0\). Lower panel: open system with \(\gamma/J=0.05\), and the mean number of phonons \(\bar{n}=10^{-2}\).