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Electrical two-qubit gates within a pair of clock-qubit magnetic molecules

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Electrical two-qubit gates within a pair of clock-qubit magnetic molecules

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dc.contributor.author	Ullah, Aman
dc.contributor.author	Hu, Ziqi
dc.contributor.author	Cerdá Calatayud, Jesús
dc.contributor.author	Aragó, Juan
dc.contributor.author	Gaita Ariño, Alejandro
dc.date.accessioned	2023-05-19T13:56:48Z
dc.date.available	2023-05-19T13:56:48Z
dc.date.issued	2022
dc.identifier.citation	Ullah, Aman Hu, Ziqi Cerdá Calatayud, Jesús Aragó, Juan Gaita Ariño, Alejandro 2022 Electrical two-qubit gates within a pair of clock-qubit magnetic molecules Npj Quantum Information 8
dc.identifier.uri	https://hdl.handle.net/10550/86732
dc.description.abstract	Enhanced coherence in HoW10 molecular spin qubits has been demonstrated by use of clock-transitions (CTs). More recently it was shown that, while operating at the CTs, it was possible to use an electrical field to selectively address HoW10 molecules pointing in a given direction, within a crystal that contains two kinds of identical but inversion-related molecules. Herein we theoretically explore the possibility of employing the electric field to effect entangling two-qubit quantum gates within a 2-qubit Hilbert space resulting from dipolar coupling of two CT-protected HoW10 molecules in a diluted crystal. We estimate the thermal evolution of T1, T2, find that CTs are also optimal operating points from the point of view of phonons, and lay out how to combine a sequence of microwave and electric field pulses to achieve coherent control within a switchable two-qubit operating space between symmetric and asymmetric qubit states that are protected both from spin-bath and from phonon-bath decoherence. This two-qubit gate approach presents an elegant correspondence between physical stimuli and logical operations, meanwhile avoiding any spontaneous unitary evolution of the qubit states. Finally, we found a highly protected 1-qubit subspace resulting from the interaction between two clock molecules.
dc.language.iso	eng
dc.relation.ispartof	Npj Quantum Information, 2022, num. 8
dc.subject	Química
dc.title	Electrical two-qubit gates within a pair of clock-qubit magnetic molecules
dc.type	journal article
dc.date.updated	2023-05-19T13:56:48Z
dc.identifier.doi	10.1038/s41534-022-00647-8
dc.identifier.idgrec	158313
dc.rights.accessRights	open access