在量子網路中量子資訊處理與量子計算的任務需要透過量子態斷層掃描精確地描述量子態。然而，在實際情況中量子態斷層掃描可能受到環境干擾或實驗不可避免的缺陷影響，導致設備變得不可信任，最糟的情況是其結果可以用古典物理來描述。為了實現在不可信設備中驗證量子態斷層掃描，本研究提出了理論方法與實驗驗證在設備無關下進行量子態斷層掃描。在理論方法中將古典過程模型引入量子斷層掃描，來判斷量子態斷層掃描是否喪失其量子特性。於實驗驗證中，本研究使用基於偏振糾纏薩格納克干涉儀的第二型自發參數下轉換光源生成高保真糾纏光子對，並利用所提出的基準方法評估在不可信設備的情況下驗證量子態斷層掃描的忠實性。更進一步，為了能將本研究提出的方法運用至多光子糾纏平台，並實際應用於量子網路，我們使用偏振糾纏薩格納克干涉儀製造兩對通訊波長1550奈米的糾纏光子，接著將這兩對糾纏光子干涉搭建出四光子糾纏的量子網路，並測得其下限保真度為0.7211 $pm$ 0.0304。這超過古典邊界 0.683，因此確認具備純四體光子糾纏態以及操控性。本研究所提出在不可信設備中驗證量子態斷層掃描的理論方法與實驗驗證，在未來可用於量子網路中。

In quantum networks, quantum information processing and quantum computing tasks require quantum state tomography to characterize quantum states accurately. However, in reality, quantum state tomography can be disrupted by environmental interference or inevitable experimental imperfections, rendering the devices untrusted, with the worst case being that the results can be described by classical physics. To enable the verifying of quantum state tomography using untrusted devices, this study proposes a theoretical method and experimental validation for performing device-independent quantum state tomography. The theoretical approach introduced the classical process model concept to develop a tool to distinguish and quantify quantum processes. Using this tool, we can determine whether quantum state tomography has lost its quantum characteristics. In the experimental verification, a high-fidelity entangled photon pair is generated using a Sagnac-based type-II polarization entanglement spontaneous parametric down-conversion source to assess whether quantum state tomography is faithfully executed in the presence of untrusted devices using the proposed benchmark method. Furthermore, to extend the proposed method of this study to multi-photon entanglement platforms and practical applications in quantum networks, we utilized a polarization Sagnac interferometer to generate two pairs of entangled photons in the telecommunications wavelength of 1550 nm. These two pairs of entangled photons were then fused to construct four-photon entanglement, with a measured lower bound fidelity of 0.7211 $pm$ 0.0304. This exceeds the classical bound of 0.683, confirming genuine four-photon entanglement and quantum steering. The theoretical method and experimental validation proposed in this study for verifying quantum state tomography using untrusted devices can be applied to quantum networks in the future.

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