Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7133
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dc.contributor.authorSharmila, B.en_US
dc.contributor.authorKRITHIKA, V. R.en_US
dc.contributor.authorPAL, SOHAMen_US
dc.contributor.authorMAHESH, T. S.en_US
dc.contributor.authorLakshmibala, S.en_US
dc.contributor.authorBalakrishnan, V.en_US
dc.date.accessioned2022-06-21T05:12:26Z
dc.date.available2022-06-21T05:12:26Z
dc.date.issued2022-04en_US
dc.identifier.citationJournal of Chemical Physics, 156(15), 154102.en_US
dc.identifier.urihttps://doi.org/10.1063/5.0087032en_US
dc.identifier.urihttp://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7133
dc.description.abstractIn recent years, the performance of different entanglement indicators obtained directly from tomograms has been assessed in continuous-variable and hybrid quantum systems. In this paper, we carry out this task in the case of spin systems. We compute the entanglement indicators from actual experimental data obtained from three liquid-state nuclear magnetic resonance (NMR) experiments and compare them with standard entanglement measures calculated from the corresponding density matrices, both experimentally reconstructed and numerically computed. The gross features of entanglement dynamics and spin squeezing properties are found to be reproduced by these entanglement indicators. However, the extent to which these indicators and spin squeezing track the entanglement during time evolution of the multipartite systems in the NMR experiments is very sensitive to the precise nature and strength of interactions as well as the manner in which the full system is partitioned into subsystems. We also use the IBM quantum computer to implement equivalent circuits that capture the dynamics of the multipartite system in one of the NMR experiments and carry out a similar comparative assessment of the performance of tomographic indicators. This exercise shows that these indicators can estimate the degree of entanglement without necessitating detailed state reconstruction procedures, establishing the advantage of the tomographic approach.en_US
dc.language.isoenen_US
dc.publisherAIP Publishingen_US
dc.subject2022
dc.titleTomographic entanglement indicators from NMR experimentsen_US
dc.typeArticleen_US
dc.contributor.departmentDept. of Physicsen_US
dc.identifier.sourcetitleJournal of Chemical Physicsen_US
dc.publication.originofpublisherForeignen_US
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