Pairwise tomography networks for many-body quantum systems

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal
View/Open full text file from the Research portal
Date
2020-06-24
Major/Subject
Mcode
Degree programme
Language
en
Pages
9
Series
PHYSICAL REVIEW RESEARCH, Volume 2, issue 2
Abstract
We introduce the concept of pairwise tomography networks to characterize 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 by means of several examples revealing its potential impact to quantum computation, communication, and simulation. We perform a proof-of-principle experiment demonstrating pairwise tomography networks of W states on IBM Q devices.
Description
Keywords
ENTANGLEMENT, STATE
Other note
Citation
Garcia-Perez , G , Rossi , M A C , Sokolov , B , Borrelli , E-M & Maniscalco , S 2020 , ' Pairwise tomography networks for many-body quantum systems ' , PHYSICAL REVIEW RESEARCH , vol. 2 , no. 2 , 023393 . https://doi.org/10.1103/PhysRevResearch.2.023393