Tetrapartite entanglement measures of W-class in noninertial frames

Torres-Arenas Ariadna J¹, López-Zúñiga Edgar O^{1, 2}, Antonio Saldaña-Herrera J^{1, 2}, Dong Qian¹, Sun Guo-Hua³, Dong Shi-Hai^{1, †}

(a) Entanglement measure (1–3 tangle) from the viewpoint of Alice (Bob) as a function of acceleration parameters r_c and r_d, (b) Entanglement measure (1–3 tangle) from the viewpoint of Charlie and David as a function of acceleration parameters r_c and r_d.