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Spin register

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Implementation of a regitser non-local gate generic to our electron—nuclear quantum register allows the preparation of entangled states of three epin spins, with fidelities exceeding 85 per cent. With these techniques, we demonstrate three-qubit phase-flip error correction.

Using optimal control, all of the above operations achieve fidelities approaching those needed for fault-tolerant quantum operation, thus paving the way to large-scale quantum computation. Besides their use with diamond spin systems, our techniques can be used to improve scaling of quantum networks relying on phosphorus in silicon 19quantum dots 22silicon carbide 11 or rare-earth ions in solids 20 This is a preview of subscription content, access via your institution.

A new reference 31 has been added to the main-text reference list and all subsequent references have been renumbered. Shor, P. in Proc.

Foundations Comput. Cory, D. et al. Experimental quantum error correction. Article ADS CAS Google Scholar. Knill, E. Benchmarking quantum computers: the five-qubit error correcting code. Boulant, N.

Experimental implementation of a concatenated quantum error-correcting code. Article ADS Google Scholar. Moussa, O.

Demonstration of sufficient control for two rounds of quantum error correction in a solid state ensemble quantum information processor.

Schindler, P. Experimental repetitive quantum error correction. Science— Reed, M. Realization of three-qubit quantum error correction with superconducting circuits. Nature— Kane, B. A silicon-based nuclear spin quantum computer. Morton, J. Solid-state quantum memory using the 31 P nuclear spin.

Neumann, P. Single-shot readout of a single nuclear spin. Koehl, W. Room temperature coherent control of defect spin qubits in silicon carbide. Nature84—87 Pla, J. A single-atom electron spin qubit in silicon. Taminiau, T. Detection and control of individual nuclear spins using a weakly coupled electron spin.

Pfaff, W. Demonstration of entanglement-by-measurement of solid-state qubits. Nature Phys. Dolde, F. Room-temperature entanglement between single defect spins in diamond.

Chekhovich, E. Nuclear spin effects in semiconductor quantum dots. Nature Mater. Bernien, H. Heralded entanglement between solid-state qubits separated by three metres.

Nature86—90 Maurer, P. Room-temperature quantum bit memory exceeding one second. High-fidelity readout and control of a nuclear spin qubit in silicon. Yin, C.

Optical addressing of an individual erbium ion in silicon. Nature91—94 Kolesov, R. Optical detection of a single rare-earth ion in a crystal. Nature Commun. Le Gall, C. Optical Stark effect and dressed exciton states in a Mn-doped CdTe quantum dot.

Dutt, M. Quantum register based on individual electronic and nuclear spin qubits in diamond. Article Google Scholar. Multipartite entanglement among single spins in diamond.

Robledo, L. High-fidelity projective read-out of a solid-state spin quantum register. Universal control and error correction in multi-qubit spin registers in diamond. Dréau, A. Single-shot readout of multiple nuclear spin qubits in diamond under ambient conditions.

Machnes, S. Comparing, optimizing, and benchmarking quantum-control algorithms in a unifying programming framework. A 84 Dür, W. Three qubits can be entangled in two inequivalent ways. A 62 Article ADS MathSciNet Google Scholar. Mermin, N. Extreme quantum entanglement in a superposition of macroscopically distinct states.

Article ADS MathSciNet CAS Google Scholar. Filidou, V. Ultrafast entangling gates between nuclear spins using photo-excited triplet states.

Mizuochi, N. Coherence of single spins coupled to a nuclear spin bath of varying density. B 80 Marseglia, L. Nanofabricated solid immersion lenses registered to single emitters in diamond. Waldherr, G.

: Spin register

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Qubits C1, C7, C8, and N 14 are controlled using DDrf gates Sec. Qubits C2, C3, C4, C5, and C6 are controlled using the methods described in Taminiau et al. The measurement sequence is broken down into basis rotations BR 1,2 , an electron readout RO , nuclear spin echoes echo 1,2 , and a multiqubit readout of the nuclear spins.

All operations are applied sequentially in the same way as shown in Fig. b , c Bar plots showing the measured expectation values nonzero terms of the ideal state only after preparing the five-spin b and seven-spin c GHZ states. The colors indicate the number of qubits involved, i.

Gray bars show the ideal expectation values. See the Supplemental Material [ 53 ] for the operator corresponding to each bar. The fidelity with the target state is 0. d Plot of GHZ state fidelity against the number of constituent qubits.

A value above 0. The blue points are the measured data, while the green points are theoretical predictions assuming a simple depolarizing noise model whose parameters are extracted from single- and two-qubit experiments.

Numerical values are given in the Supplemental Material [ 53 ]. a Dynamical decoupling for spin C5. B , T , and n are fit parameters which account for the decay of the fidelity due to interactions with the nuclear spin bath, external noise, and pulse errors.

b Dynamical decoupling of the N 14 spin. Solid lines are fits to f t , but with A as a free parameter to account for the observed decrease in the Z Z correlations at large pulse numbers, likely due to pulse errors.

With decoupling pulses, genuine two-qubit entanglement is witnessed at times up to In addition, interpolation of the fit yields For pair 1, the fitted decay times T are 0.

For pair 2, the equivalent values are 0. It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author s and the published article's title, journal citation, and DOI are maintained.

Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

Physical Review X Highlights Recent Subjects Accepted Collections Authors Referees Search Press About Editorial Team. Featured in Physics Open Access. A Ten-Qubit Solid-State Spin Register with Quantum Memory up to One Minute C. Bradley, J.

Randall, M. Abobeih, R. Berrevoets, M. Degen, M. Bakker, M. Markham, D. Twitchen, and T. Taminiau Phys. X 9 , — Published 11 September See Synopsis: Diamond Qubits Take the Stage.

Article References Citing Articles Supplemental Material Article References Citing Articles Supplemental Material PDF HTML Export Citation.

Abstract Spins associated with single defects in solids provide promising qubits for quantum-information processing and quantum networks. Research Areas. Quantum control Quantum entanglement Quantum gates Quantum memories. Diamond Qubits Take the Stage Published 11 September A ten-qubit system based on spins in impure diamond achieves coherence times of over a minute.

See more in Physics. Taminiau TUDelft. Issue Vol. Authorization Required. Log In. Other Options Buy Article » Find an Institution with the Article ».

Figure 1 Illustration of the ten-qubit register developed in this work. Figure 2 a Illustration of the pulse sequence employed to realize a DDrf gate. Figure 3 a Nuclear spin spectroscopy.

Figure 4 a Experimental sequence to prepare an electron-nuclear Bell state and determine the expectation value of the two-qubit operator Z X. Figure 5 a Experimental sequence for the preparation of a nuclear-nuclear Bell state and measurement of the two-qubit operator Z Z. Figure 6 Measured Bell state fidelities for all pairs of qubits in the ten-qubit register.

Figure 8 a Dynamical decoupling for spin C5. Sign up to receive regular email alerts from Physical Review X Sign up. Create an account ×. Journal: Phys.

X PRX Energy PRX Life PRX Quantum Rev. A Phys. B Phys. C Phys. D Phys. E Phys. Research Phys. Beams Phys. ST Accel.

[] A qubit solid-state spin register with quantum memory up to one minute This was published in the form […]. Diabetes only Retrospective experience is not accepted to count towards post completion SPIN modules in diabetes and applications must be prospective. Recent work has demonstrated the ability to use the same platform for trapping alkaline-earth atoms, which have attractive properties for the storage and coherent manipulation of quantum information, as well as for cooling, state preparation, and measurement of the internal state of the atoms 16 , 17 , 18 , 19 , 20 , 21 , When can I apply? Atom-by-atom assembly of defect-free one-dimensional cold atom arrays. Young, A. President Wooldridge praises spirit of cooperation following IOC meetings February 27,
Product Registration Isoya Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei , China, J. Science , — Registration Fees are: Registration including 1st year payment : GBP £ Pfaff, W. Simmons Nature Nanotechnology Isotope engineering for spin defects in van der Waals materials Ruotian Gong Xinyi Du Chong Zu Nature Communications Real-time quantum error correction beyond break-even V.
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Step 3 : Please login Peatix system for payment. jp The note was a dded on July 1 9 th. Only credit card is available outside Japan. Spin echoes dashed boxes built into the measurement sequence protect the nuclear spins from dephasing errors.

Blue purple bars show the experimental ideal expectation values for each operator. The nuclear-nuclear correlations are well preserved after a nondestructive measurement of the electron spin in the X basis.

Measured Bell state fidelities for all pairs of qubits in the ten-qubit register. Genuine entanglement is confirmed in all cases, as witnessed by a fidelity exceeding 0.

Qubits C1, C7, C8, and N 14 are controlled using DDrf gates Sec. Qubits C2, C3, C4, C5, and C6 are controlled using the methods described in Taminiau et al. The measurement sequence is broken down into basis rotations BR 1,2 , an electron readout RO , nuclear spin echoes echo 1,2 , and a multiqubit readout of the nuclear spins.

All operations are applied sequentially in the same way as shown in Fig. b , c Bar plots showing the measured expectation values nonzero terms of the ideal state only after preparing the five-spin b and seven-spin c GHZ states.

The colors indicate the number of qubits involved, i. Gray bars show the ideal expectation values. See the Supplemental Material [ 53 ] for the operator corresponding to each bar.

The fidelity with the target state is 0. d Plot of GHZ state fidelity against the number of constituent qubits. A value above 0. The blue points are the measured data, while the green points are theoretical predictions assuming a simple depolarizing noise model whose parameters are extracted from single- and two-qubit experiments.

Numerical values are given in the Supplemental Material [ 53 ]. a Dynamical decoupling for spin C5. B , T , and n are fit parameters which account for the decay of the fidelity due to interactions with the nuclear spin bath, external noise, and pulse errors.

b Dynamical decoupling of the N 14 spin. Solid lines are fits to f t , but with A as a free parameter to account for the observed decrease in the Z Z correlations at large pulse numbers, likely due to pulse errors. With decoupling pulses, genuine two-qubit entanglement is witnessed at times up to In addition, interpolation of the fit yields For pair 1, the fitted decay times T are 0.

For pair 2, the equivalent values are 0. It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.

This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author s and the published article's title, journal citation, and DOI are maintained.

Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

Physical Review X Highlights Recent Subjects Accepted Collections Authors Referees Search Press About Editorial Team. Featured in Physics Open Access.

A Ten-Qubit Solid-State Spin Register with Quantum Memory up to One Minute C. Bradley, J. Randall, M. Abobeih, R. Berrevoets, M. Degen, M. Bakker, M. Markham, D. Twitchen, and T. Taminiau Phys. X 9 , — Published 11 September See Synopsis: Diamond Qubits Take the Stage.

Article References Citing Articles Supplemental Material Article References Citing Articles Supplemental Material PDF HTML Export Citation. Abstract Spins associated with single defects in solids provide promising qubits for quantum-information processing and quantum networks.

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