Yu-Shiba-Rusinov Qubit

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorMishra, Archana
dc.contributor.authorSimon, Pascal
dc.contributor.authorHyart, Timo
dc.contributor.authorTrif, Mircea
dc.contributor.departmentInstitute of Physics of the Polish Academy of Sciences
dc.contributor.departmentUniversité Paris-Saclay
dc.contributor.departmentCorrelated Quantum Materials (CQM)
dc.contributor.departmentDepartment of Applied Physicsen
dc.date.accessioned2021-12-15T07:23:52Z
dc.date.available2021-12-15T07:23:52Z
dc.date.issued2021-12-07
dc.description.abstractMagnetic impurities in s-wave superconductors lead to spin-polarized Yu-Shiba-Rusinov (YSR) in-gap states. Chains of magnetic impurities offer one of the most viable routes for the realization of Majorana bound states, which hold promise for topological quantum computing. However, this ambitious goal looks distant, since no quantum coherent degrees of freedom have yet been identified in these systems. To fill this gap, we propose an effective two-level system, a YSR qubit, stemming from two nearby impurities. Using a time-dependent wave-function approach, we derive an effective Hamiltonian describing the YSR-qubit evolution as a function of the distance between the impurity spins, their relative orientations, and their dynamics. We show that the YSR qubit can be controlled and read out using state-of-the-art experimental techniques for manipulation of the spins. Finally, we address the effect of spin noise on the coherence properties of the YSR qubit and show robust behavior for a wide range of experimentallyrelevant parameters. Looking forward, the YSR qubit could facilitate the implementation of a universal set of quantum gates in hybrid systems where they are coupled to topological Majorana qubits.en
dc.description.versionPeer revieweden
dc.format.extent21
dc.format.extent1-21
dc.format.mimetypeapplication/pdf
dc.identifier.citationMishra , A , Simon , P , Hyart , T & Trif , M 2021 , ' Yu-Shiba-Rusinov Qubit ' , PRX Quantum , vol. 2 , no. 4 , 040347 , pp. 1-21 . https://doi.org/10.1103/PRXQuantum.2.040347en
dc.identifier.doi10.1103/PRXQuantum.2.040347
dc.identifier.issn2691-3399
dc.identifier.otherPURE UUID: 9db5bba3-4825-476e-88c0-fb3e91336b89
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/9db5bba3-4825-476e-88c0-fb3e91336b89
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/76806043/Yu_Shiba_Rusinov_Qubit.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/111613
dc.identifier.urnURN:NBN:fi:aalto-2021121510754
dc.language.isoenen
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPRX Quantumen
dc.relation.ispartofseriesVolume 2, issue 4en
dc.rightsopenAccessen
dc.titleYu-Shiba-Rusinov Qubiten
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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