非惯性系中的三体纠缠
Tripartite Entanglement in Noninertial Frame
摘要：
当三方中的一方相对于其他各方以匀加速运动时，研究了三方纠缠。正如Unruh效应所表明的那样，三重纠缠随加速度的增加而减小。然而，与二体纠缠不同，三体纠缠在无限加速极限下并不完全消失。例如，如果三方最初共享Greenberger-Horne-Zeilinger或W-态，则相应的$π$ -缠结（三方纠缠的度量之一）在此极限下分别为$π/6 \sim 0.524$或0.176。这一事实表明，即使其中一方接近Rindler视界，三方量子信息处理也是可能的。这个惊人的结果的物理意义在黑洞物理学的背景下进行了讨论。
英文摘要：
The tripartite entanglement is examined when one of the three parties moves with a uniform acceleration with respect to other parties. As Unruh effect indicates, the tripartite entanglement exhibits a decreasing behavior with increasing the acceleration. Unlike the bipartite entanglement, however, the tripartite entanglement does not completely vanish in the infinite acceleration limit. If the three parties, for example, share the Greenberger-Horne-Zeilinger or W-state initially, the corresponding $π$-tangle, one of the measures for tripartite entanglement, is shown to be $π/6 \sim 0.524$ or 0.176 in this limit, respectively. This fact indicates that the tripartite quantum information processing may be possible even if one of the parties approaches to the Rindler horizon. The physical implications of this striking result are discussed in the context of black hole physics.
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