Środowiskowe Seminarium z Informacji i Technologii Kwantowych

Quantum measurements are the key for extracting information from quantum systems and for connecting the quantum world with the classical world. Understanding the power and limitation of measurements is of paramount importance not only to foundational studies, but also to many applications, such as quantum tomography, metrology, and communication. However, demonstrating the generalized measurement on single-qubit system and multi-qubit systems in experiments has is a daunting task. Here, we report the very recent results in our group which have demonstrated the advantage of generalized collective measurement on different tasks, e.g, state tomography, parameter estimation and back-action reduction.