Pairwise tomography networks for many-body quantum systems
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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9
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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
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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