Pairwise tomography networks for many-body quantum systems
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2020-06-24
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Mcode
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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
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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