Universal quantum computing using electro-nuclear wavefunctions of rare-earth ions

Abstract

We propose a scheme for universal quantum computing based on Kramers rare-earth ions. Their nuclear spins in the presence of a Zeeman-split electronic crystal field ground state act as 'passive' qubits which store quantum information. The qubits can be activated optically by fast coherent transitions to excited crystal field states with a magnetic moment. The dipole interaction between these states is used to implement CNOT gates. We compare our proposal with a similar one based on phosphorus donor atoms in silicon and discuss the significantly improved CNOT gate time as compared to rare-earth implementations via the slower dipole blockade.

arXiv comment19 pages, 10 figures

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Cited by in corpus (11)

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• High connectivity quantum processor nodes using single-ion-qubits in rare-earth-ion-doped crystals
• Sub-megahertz homogeneous linewidth for Er in Si via in situ single photon detection
• Optically detected magnetic resonance with an open source platform
• Optical and Zeeman spectroscopy of individual Er ion pairs in silicon
• Microscopic treatment of instantaneous spectral diffusion and its effect on quantum gate fidelities in rare-earth-ion-doped crystals
• Engineering spin-orbit effects and Berry curvature by deposition of Eu on WSe${}_2$
• Investigation of magnetic properties of $4f$-adatoms on graphene
• Microscopic model of spin flip-flop processes in rare-earth-ion-doped crystals
• Comparing the performance of practical two-qubit gates for individual ${}^{171}$Yb ions in yttrium orthovanadate
• Designing gate operations for single ion quantum computing in rare-earth-ion-doped crystals