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

Authors :
Ullah, Aman
Hu, Ziqi
Cerdá, Jesus
Aragó, Juan
Gaita-Ariño, Alejandro
Source :
npj Quantum Inf 8, 133 (2022)
Publication Year :
2022

Abstract

Enhanced coherence in HoW$_{10}$ 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 HoW$_{10}$ 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 among two neighbouring CT-protected HoW$_{10}$ qubits within a diluted crystal. We estimate the thermal evolution of $T_1$, $T_2$, 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 2-qubit operating space that is protected both from spin-bath and from phonon-bath decoherence. Finally, we found a highly protected 1-qubit subspace resulting from the interaction between two clock molecules.<br />Comment: updated with minor corrections

Details

Database :
arXiv
Journal :
npj Quantum Inf 8, 133 (2022)
Publication Type :
Report
Accession number :
edsarx.2204.09592
Document Type :
Working Paper
Full Text :
https://doi.org/10.1038/s41534-022-00647-8