Three-dimensional solid-state qubit arrays with long-lived spin coherence

C.J. Stephen, B.L. Green, Y.N.D. Lekhai, L. Weng, P. Hill, S. Johnson, A.C. Frangeskou, P.L. Diggle, M.J. Strain, E. Gu, M.E. Newton, J.M. Smith, P.S. Salter, G.W. Morely

Research output: Working paper

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Abstract

Three-dimensional arrays of silicon transistors increase the density of bits. Solid-state qubits are much larger so could benefit even more from using the third dimension given that useful fault-tolerant quantum computing will require at least 100,000 physical qubits and perhaps one billion. Here we use laser writing to create 3D arrays of nitrogen-vacancy centre (NVC) qubits in diamond. This would allow 5 million qubits inside a commercially available 4.5x4.5x0.5 mm diamond based on five nuclear qubits per NVC and allowing (10μm)3 per NVC to leave room for our laser-written electrical control. The spin coherence times we measure are an order of magnitude longer than previous laser-written qubits and at least as long as non-laser-written NVC. As well as NVC quantum computing, quantum communication and nanoscale sensing could benefit from the same platform. Our approach could also be extended to other qubits in diamond and silicon carbide.
Original languageEnglish
Place of PublicationIthaca, NY
Publication statusPublished - 10 Jul 2018

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solid state
nitrogen
diamonds
quantum computation
lasers
silicon transistors
quantum communication
silicon carbides
carbides
rooms
platforms

Keywords

  • silicon transistors
  • three-dimensional arrays
  • solid-state qubits

Cite this

Stephen, C. J., Green, B. L., Lekhai, Y. N. D., Weng, L., Hill, P., Johnson, S., ... Morely, G. W. (2018). Three-dimensional solid-state qubit arrays with long-lived spin coherence. Ithaca, NY.
Stephen, C.J. ; Green, B.L. ; Lekhai, Y.N.D. ; Weng, L. ; Hill, P. ; Johnson, S. ; Frangeskou, A.C. ; Diggle, P.L. ; Strain, M.J. ; Gu, E. ; Newton, M.E. ; Smith, J.M. ; Salter, P.S. ; Morely, G.W. / Three-dimensional solid-state qubit arrays with long-lived spin coherence. Ithaca, NY, 2018.
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Stephen, CJ, Green, BL, Lekhai, YND, Weng, L, Hill, P, Johnson, S, Frangeskou, AC, Diggle, PL, Strain, MJ, Gu, E, Newton, ME, Smith, JM, Salter, PS & Morely, GW 2018 'Three-dimensional solid-state qubit arrays with long-lived spin coherence' Ithaca, NY.

Three-dimensional solid-state qubit arrays with long-lived spin coherence. / Stephen, C.J.; Green, B.L.; Lekhai, Y.N.D.; Weng, L.; Hill, P.; Johnson, S.; Frangeskou, A.C.; Diggle, P.L.; Strain, M.J.; Gu, E.; Newton, M.E.; Smith, J.M.; Salter, P.S.; Morely, G.W.

Ithaca, NY, 2018.

Research output: Working paper

TY - UNPB

T1 - Three-dimensional solid-state qubit arrays with long-lived spin coherence

AU - Stephen, C.J.

AU - Green, B.L.

AU - Lekhai, Y.N.D.

AU - Weng, L.

AU - Hill, P.

AU - Johnson, S.

AU - Frangeskou, A.C.

AU - Diggle, P.L.

AU - Strain, M.J.

AU - Gu, E.

AU - Newton, M.E.

AU - Smith, J.M.

AU - Salter, P.S.

AU - Morely, G.W.

PY - 2018/7/10

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N2 - Three-dimensional arrays of silicon transistors increase the density of bits. Solid-state qubits are much larger so could benefit even more from using the third dimension given that useful fault-tolerant quantum computing will require at least 100,000 physical qubits and perhaps one billion. Here we use laser writing to create 3D arrays of nitrogen-vacancy centre (NVC) qubits in diamond. This would allow 5 million qubits inside a commercially available 4.5x4.5x0.5 mm diamond based on five nuclear qubits per NVC and allowing (10μm)3 per NVC to leave room for our laser-written electrical control. The spin coherence times we measure are an order of magnitude longer than previous laser-written qubits and at least as long as non-laser-written NVC. As well as NVC quantum computing, quantum communication and nanoscale sensing could benefit from the same platform. Our approach could also be extended to other qubits in diamond and silicon carbide.

AB - Three-dimensional arrays of silicon transistors increase the density of bits. Solid-state qubits are much larger so could benefit even more from using the third dimension given that useful fault-tolerant quantum computing will require at least 100,000 physical qubits and perhaps one billion. Here we use laser writing to create 3D arrays of nitrogen-vacancy centre (NVC) qubits in diamond. This would allow 5 million qubits inside a commercially available 4.5x4.5x0.5 mm diamond based on five nuclear qubits per NVC and allowing (10μm)3 per NVC to leave room for our laser-written electrical control. The spin coherence times we measure are an order of magnitude longer than previous laser-written qubits and at least as long as non-laser-written NVC. As well as NVC quantum computing, quantum communication and nanoscale sensing could benefit from the same platform. Our approach could also be extended to other qubits in diamond and silicon carbide.

KW - silicon transistors

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UR - https://arxiv.org/abs/1807.03643

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BT - Three-dimensional solid-state qubit arrays with long-lived spin coherence

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Stephen CJ, Green BL, Lekhai YND, Weng L, Hill P, Johnson S et al. Three-dimensional solid-state qubit arrays with long-lived spin coherence. Ithaca, NY. 2018 Jul 10.