Seminar by Guillermo GarcĂa [University of Turku]
people 2020/01/22
Seminar by Guillermo García [University of Turku]
DATE: 28 January 2020 (14:30h)
PLACE: Aula 3.20, 3rd floor, Faculty of Physics (Dpt.Física de la Matèria Condensada)
TITLE: Pairwise tomography networks for many-body quantum systems
ABSTRACT: We introduce the concept of pairwise tomography networks to characterise quantum properties in many-body systems and demonstrate an efficient protocol to measure them experimentally. Pairwise tomography networks are generators of multiplex networks where each layer represents the graph of a relevant quantifier such as, e.g., concurrence, quantum discord, purity, quantum mutual information, or classical correlations. We propose a measurement scheme to perform two-qubit tomography of all pairs showing exponential improvement in the number of qubits N with respect to previously existing methods. We illustrate the usefulness of our approach for device characterisation and quantum simulations.