Phase Transitions and Noise Robustness of Quantum Graph States
Tatsuya Numajiri, Shion Yamashika, Tomonori Tanizawa, Ryosuke Yoshii, Yuki Takeuchi, and Shunji Tsuchiya
Quantum 10, 2094 (2026). https://doi.org/10.22331/q-2026-05-05-2094 Graph states are entangled states that are essential for quantum information processing. As experimental advances enable the realization of large-scale graph states, efficient fidelity estimation methods are crucial for assessing their robustness against noise. However, calculations of exact fidelity become intractable for large systems due to the exponential growth in the number of stabilizers. In this work, we show that the fi