Experimental demonstration of entanglement needs to have a precise control of experimentalist over the system on which the measurements are performed as prescribed by an appropriate entanglement witness. To avoid such trust problem, recently, device-independent entanglement witnesses (DIEWs) for genuine tripartite entanglement have been proposed where witnesses are capable of testing genuine entanglement without precise description of Hilbert space dimension and measured operators i.e. apparatus are treated as black boxes. Here, we design a protocol for enhancing the possibility of identifying genuine tripartite entanglement in a device independent manner. We consider three mixed tripartite quantum states none of whose genuine entanglement can be detected by applying certain DIEWs, but their genuine tripartite entanglement can be detected by applying the same when distributed in some suitable entanglement swapping network.

中文翻译：

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量子网络场景中真正三方纠缠的检测

纠缠的实验演示需要对实验人员进行精确控制，以按照适当的纠缠见证人的规定对要执行测量的系统进行控制。为了避免这种信任问题，近来，已经提出了用于真正三方纠缠的与设备无关的纠缠见证人（DIEW），其中见证人能够在不精确描述希尔伯特空间维数的情况下测试真正的纠缠，并且将测量的运算符即设备视为黑匣子。在这里，我们设计了一种协议，用于以独立于设备的方式增强识别真正的三方纠缠的可能性。我们考虑了三个混合的三方量子态，通过应用某些DIEW不能检测到它们的真正纠缠，