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

• URL: http://arxiv.org/abs/2009.14126v1
• Date: Tue, 29 Sep 2020 16:20:00 GMT
• Title: Universal quantum computing using electro-nuclear wavefunctions of rare-earth ions
• Authors: Manuel Grimm (1 and 2), Adrian Beckert (2 and 3), Gabriel Aeppli (2 and 3 and 4), Markus M\"uller (1) ((1) Condensed Matter Theory Group, Paul Scherrer Institut, (2) ETH Z\"urich, (3) Photon Science Division, Paul Scherrer Institut, (4) EPF Lausanne)
• Abstract summary: 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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