Quantum computer hardware based on rare-earth-ion-doped inorganic crystals |
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| Institution: | 1. Department of Physics, Lund Institute of Technology (LTH), P.O. Box 118, S-221 00 Lund, Sweden;2. Spectrum Lab, Montana State University, P.O. Box 173510, Bozeman, MT, USA;1. The School of Physical and Chemical Sciences, University of Canterbury, PB4800, Christchurch 8140, New Zealand;2. The Dodd-Walls Centre for Photonic and Quantum Technologies, New Zealand;1. Robinson Research Institute, Victoria University of Wellington, PO Box 33436, Lower Hutt 5046, New Zealand;2. The MacDiarmid Institute for Advanced Materials and Nanotechnology, SCPS, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand;1. Politecnico di Torino, DISAT, Istituto di Ingegneria e Fisica dei Materiali, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy;2. Department of Electronics and Communications Engineering, Tampere University of Technology, Korkeakoulunkatu 3, FI-33720 Tampere, Finland;3. BioMediTech, Tampere, Finland;4. Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku, Finland;5. nLIGHT Corporation, Sorronrinne 9, FI-08500 Lohja, Finland;6. CNRS, Université de Bordeaux, ISM, 351 Cours de la Libération, F-33405 Talence, France;7. CNRS, Université de Bordeaux, ICMCB, 87 Avenue du Dr Schweitzer, F-33608 Pessac, France;1. Departamento de Química-Física, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panama;2. National Systems of Investigators (SNI), SENACYT, Panama |
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| Abstract: | We present a scheme for generating multiple, strongly interacting qubits in rare-earth-ion-doped inorganic crystals at cryogenic temperatures. Two ground state hyperfine levels, with hour long lifetimes and ms decoherence times are chosen as qubit states. Controlled logic between the qubits is accomplished using the change in permanent dipole moment induced by an optical transition between the ground and excited state of these ions. The scheme is based on existing material data and established measurement techniques and should therefore be straightforward to realise in practice. The procedure used for creating the qubits can be generalised also to other solid state systems. |
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