FisMat2017 - Submission - View

Abstract's title: Witnessing entanglement with the Fisher information: from metrology to topological quantum phase transitions.
Submitting author: Augusto Smerzi
Affiliation: INO-CNR
Affiliation Address: Largo Enrico fermi 2, 50125, Firenze
Country: Italy
Oral presentation/Poster (Author's request): Oral presentation
Other authors and affiliations:
Abstract

The Fisher information (FI) can witness multipartite entanglement. This sheds light on a profound relation between the distinguishability of quantum states (characterized by the FI through the Cramer-Rao theorem), and entanglement. The framework encompasses quantum technologies for metrology and interferometric phase estimations, foundational problems ranging from the quantum Zeno dynamics to Bell nonlocality up to the characterization of topological quantum phase transitions.