Colloquium with Augusto Smerzi
Tuesday, March 11, 2025, 16:30
HS C
Students and Academic Staff
We invite you to our colloquium with guest Augusto Smerzi from CNR-INO, QSTAR & LENS.
Entanglement for Quantum Technologies
Multipartite entanglement (ME) is crucial in quantum technologies. However, its detection and characterization are challenging due to the exponential growth of Hilbert space with the amount of resources necessary for their implementation. In this talk, I will provide a conceptual and operational perspective on quantum entanglement, distinguishing it from classical correlations. I will introduce a novel approach to detecting and characterizing ME based on the response of quantum-correlated states to external driving. This method leverages Fisher information, a key quantity in parameter estimation theory, which not only quantifies a system’s sensitivity to parameter changes but also serves as a witness for entanglement. Furthermore, by establishing a direct connection between Fisher information and the structure of entangled states, I will demonstrate how Young diagrams encode the redistribution of Fisher information across different partitions of a quantum system, providing a systematic framework for classifying multipartite entanglement. This method is scalable and experimentally viable, compatible with high-precision measurement technologies such as atomic interferometry.
Organizers: K. Erath-Dulitz, H.-C. Nägerl, T. Schrabback