The retrieval of lost entanglement for relatively accelerated fermionic observers of a tripartite system by a partial measurement technique has been investigated. From the prospective of the negativities of one-tangles and the π-tangle, we show that the degraded entanglement in noninertial frames with single-mode approximation is completely retrieved by an optimal strength of the partial measurement or the partial measurement reversal. In addition, we find that the optimal one-tangle with respect to inertial and noninertial observers turns out to be the same for an optimal strength of partial measurements at q ₀=0 when two accelerated observers move with infinite acceleration.

已经研究了通过部分测量技术为三方系统的相对加速的费米子观察者恢复失去的纠缠。从单缠结和π缠结的负性的角度来看，我们表明单模近似的非惯性系中退化的纠缠完全可以通过部分测量的最佳强度或部分测量反转来恢复。此外，我们发现，当两个加速观察者以无限加速度移动时，对于在q ₀ = 0处的局部测量的最佳强度，对于惯性和非惯性观察者的最佳单缠结结果是相同的。