Creation of Two-Particle Entanglement in Open Macroscopic Quantum Systems

Figure 3

(a) Concurrence as a function of the rescaled time, for fixed 𝜖=𝜈_𝑐/𝜈_𝑇=1, being respectively the cut-off and thermal frequency (𝜈_𝑇=𝑘_𝐵𝑇/ℎ with 𝑇=300𝐾) and the form factor, 𝑓_𝑐(𝑘)=|𝑘|. Other data are 𝑝=0.5, 𝑣=0.48, 𝜘_𝑐=0.05. (b) Plot of the concurrence at the peak (obtained from (a)) as a function of the number of spins 𝑁. (c) Plot of the collapse time, 𝜏_𝑐, as a function of the number of spins, 𝑁. The dashed line is the best fit exp(−𝛼𝑁) with 𝛼=0.0838±0.0002.

(a)

(b)

(c)