Benchmarking entangled states on a quantum computer

While full fault tolerance remains an open challenge, the rapid and continuous development of platforms for quantum computation calls for efficient and reliable benchmarking methods for quantum circuit execution. In this context, accurate assessment of state preparation and validation protocols is essential. Focusing on a fundamental and widely used classes of multipartite entangled states, namely one-excitation wave packets, the class containing the W state, this project will investigate and compare different strategies for their preparation and validation, with particular emphasis on techniques based on the estimation of quantum state fidelity between the experimentally prepared state and the corresponding ideal target state. Analytical methods and numerical simulations will be used to evaluate the performance, scalability, and robustness of the considered techniques. Experimentally, the corresponding quantum circuits will be implemented on a real quantum computing platform to assess their practical feasibility and performance under realistic noise conditions. The results will provide a systematic comparison of state preparation and fidelity estimation methods, contributing to the development of efficient benchmarking tools for near-term quantum devices.