Tripartite entanglement of fermionic system in accelerated frames

• Tripartite entanglement of fermionic system in noninertial frames is studied.
• Linear contraction criterion for quantifying tripartite entanglement is used.
• Acceleration does not produce any bipartite entanglement.
• The invariance of entanglement quantifier depends on accelerated observers.
• The tripartite entanglement degrades against the acceleration, it never vanishes.

The dynamics of tripartite entanglement of fermionic system in noninertial frames through linear contraction criterion when one or two observers are accelerated is investigated. In one observer accelerated case the entanglement measurement is not invariant with respect to the partial realignment of different subsystems and for two observers accelerated case it is invariant. It is shown that the acceleration of the frame does not generate entanglement in any bipartite subsystems. Unlike the bipartite states, the genuine tripartite entanglement does not completely vanish in both one observer accelerated and two observers accelerated cases even in the limit of infinite acceleration. The degradation of tripartite entanglement is fast when two observers are accelerated than when one observer is accelerated. It is shown that tripartite entanglement is a better resource for quantum information processing than the bipartite entanglement in noninertial frames.