Coherent control of individual electron spins in a two-dimensional quantum dot array
Source abstract
Abstract
The coherent manipulation of individual quantum objects organized in arrays is a prerequisite to any scalable quantum information platform. The cumulated efforts to control electron spins in quantum dot arrays have permitted the recent realization of quantum simulators and multielectron spin-coherent manipulations. Although a natural path to resolve complex quantum-matter problems and to process quantum information, two-dimensional (2D) scaling with a high connectivity of such implementations remains undemonstrated. Here we demonstrate the 2D coherent control of individual electron spins in a 3 × 3 array of tunnel-coupled quantum dots. We focus on several key quantum functionalities: charge-deterministic loading and displacement, local spin readout and local coherent exchange manipulation between two electron spins trapped in adjacent dots. This work lays some of the foundations to exploit a 2D array of electron spins for quantum simulation and information processing.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Quantum and electron transport phenomena · Quantum Computing Algorithms and Architecture · Advancements in Semiconductor Devices and Circuit Design
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
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1. Shor, P. W. Scheme for reducing decoherence in quantum computer memory. Phys. Rev. A 52, R2493 (1995).10.1103/PhysRevA.52.R2493 ↗
2. Bacon, D. Operator quantum error-correcting subsystems for self-correcting quantum memories. Phys. Rev. A 73, 012340 (2006).10.1103/PhysRevA.73.012340 ↗
3. Fowler, A. G. Two-dimensional color-code quantum computation. Phys. Rev. A 83, 042310 (2011).10.1103/PhysRevA.83.042310 ↗
4. Fowler, A. G., Mariantoni, M., Martinis, J. M. & Cleland, A. N. Surface codes: towards practical large-scale quantum computation. Phys. Rev. A 86, 032324 (2012).10.1103/PhysRevA.86.032324 ↗
5. Dagotto, E. & Rice, T. M. Surprises on the way from one- to two-dimensional quantum magnets: the ladder materials. Science 271, 618–623 (1996).10.1126/science.271.5249.618 ↗
6. Veldhorst, M., Eenink, H. G. J., Yang, C. H. & Dzurak, A. S. Silicon CMOS architecture for a spin-based quantum computer. Nat. Commun. 8, 1766 (2017).10.1038/s41467-017-01905-6 ↗
7. Vandersypen, L. M. K. et al. Interfacing spin qubits in quantum dots and donors-hot, dense, and coherent. npj Quant. Inf. 3, 34 (2017).10.1038/s41534-017-0038-y ↗
8. Ito, T. et al. Detection and control of charge states in a quintuple quantum dot. Sci. Rep. 6, 39113 (2016).10.1038/srep39113 ↗
9. Fujita, T., Baart, T. A., Reichl, C., Wegscheider, W. & Vandersypen, L. M. K. Coherent shuttle of electron-spin states. npj Quant. Inf. 3, 22 (2017).10.1038/s41534-017-0024-4 ↗
10. Volk, C. et al. Loading a quantum-dot based ‘qubyte’ register. npj Quant. Inf. 5, 29 (2019).10.1038/s41534-019-0146-y ↗
11. Hensgens, T. et al. Quantum simulation of a Fermi–Hubbard model using a semiconductor quantum dot array. Nature 548, 70–73 (2017).10.1038/nature23022 ↗
12. Dehollain, J. P. et al. Nagaoka ferromagnetism observed in a quantum dot plaquette. Nature 579, 528–533 (2020).10.1038/s41586-020-2051-0 ↗
13. Thalineau, R. et al. A few-electron quadruple quantum dot in a closed loop. Appl. Phys. Lett. 101, 103102 (2012).10.1063/1.4749811 ↗
14. Mukhopadhyay, U., Dehollain, J. P., Reichl, C., Wegscheider, W. & Vandersypen, L. M. K. A 2 × 2 quantum dot array with controllable inter-dot tunnel couplings. Appl. Phys. Lett. 112, 183505 (2018).10.1063/1.5025928 ↗
15. Bertrand, B. et al. Quantum manipulation of two-electron spin states in isolated double quantum dots. Phys. Rev. Lett. 115, 096801 (2015).10.1103/PhysRevLett.115.096801 ↗
16. Flentje, H. et al. A linear triple quantum dot system in isolated configuration. Appl. Phys. Lett. 110, 233101 (2017).10.1063/1.4984745 ↗
17. Flentje, H. et al. Coherent long-distance displacement of individual electron spins. Nat. Commun. 8, 501 (2017).10.1038/s41467-017-00534-3 ↗
18. Baart, T. A., Jovanovic, N., Reichl, C., Wegscheider, W. & Vandersypen, L. M. K. Nanosecond-timescale spin transfer using individual electrons in a quadruple-quantum-dot device. Appl. Phys. Lett. 109, 043101 (2016).10.1063/1.4959183 ↗
19. Bertrand, B. et al. Fast spin information transfer between distant quantum dots using individual electrons. Nat. Nanotechnol. 11, 672–676 (2016).10.1038/nnano.2016.82 ↗
20. Petta, J. R. et al. Coherent manipulation of coupled electron spins in semiconductor quantum dots. Science 309, 2180–2184 (2005).10.1126/science.1116955 ↗
21. Martins, F. et al. Noise suppression using symmetric exchange gates in spin qubits. Phys. Rev. Lett. 116, 116801 (2016).10.1103/PhysRevLett.116.116801 ↗
22. Reed, M. et al. Reduced sensitivity to charge noise in semiconductor spin qubits via symmetric operation. Phys. Rev. Lett. 116, 110402 (2016).10.1103/PhysRevLett.116.110402 ↗
23. Brunner, R. et al. Two-qubit gate of combined single-spin rotation and interdot spin exchange in a double quantum dot. Phys. Rev. Lett. 107, 146801 (2011).10.1103/PhysRevLett.107.146801 ↗
24. Veldhorst, M. et al. A two-qubit logic gate in silicon. Nature 526, 410–414 (2015).10.1038/nature15263 ↗
25. Zajac, D. M. et al. Resonantly driven CNOT gate for electron spins. Science 359, 439–442 (2018).10.1126/science.aao5965 ↗
26. Watson, T. F. et al. A programmable two-qubit quantum processor in silicon. Nature 555, 633–637 (2018).10.1038/nature25766 ↗
27. Qiao, H. et al. Coherent multispin exchange coupling in a quantum-dot spin chain. Phys. Rev. X 10, 031006 (2020).
28. Hill, C. D. et al. A surface code quantum computer in silicon. Sci. Adv. 1, e1500707 (2015).10.1126/sciadv.1500707 ↗
29. Li, R. et al. A crossbar network for silicon quantum dot qubits. Sci. Adv. 4, eaar3960 (2018).10.1126/sciadv.aar3960 ↗
30. Vinet, M. et al. Towards scalable silicon quantum computing. In 2018 IEEE International Electron Devices Meeting (IEDM) 6.5.1–6.5.4 (IEEE, 2018).10.1109/IEDM.2018.8614675 ↗
31. Brunet, L. et al. First demonstration of a CMOS over CMOS 3D VISI CoolCube integration on 300 mm wafers. In 2016 IEEE Symposium on VLSI Technology 1–2 (IEEE, 2016).10.1109/VLSIT.2016.7573428 ↗
32. Chanrion, E. et al. Charge detection in an array of CMOS quantum dots. Phys. Rev. Appl. 14, 024066 (2020).10.1103/PhysRevApplied.14.024066 ↗
33. Zwolak, J. P. et al. Autotuning of double-dot devices in situ with machine learning. Phys. Rev. Appl. 13, 034075 (2020).10.1103/PhysRevApplied.13.034075 ↗
34. Hanson, R. et al. Single-shot read-out of electron spin states in a quantum dot using spin-dependent tunnel rates. Phys. Rev. Lett. 94, 196802 (2005).10.1103/PhysRevLett.94.196802 ↗
35. Meunier, T. et al. Experimental signature of phonon-mediated spin relaxation in a two-electron quantum dot. Phys. Rev. Lett. 98, 126601 (2007).10.1103/PhysRevLett.98.126601 ↗
36. Bautze, T. et al. Theoretical, numerical, and experimental study of a flying qubit electronic interferometer. Phys. Rev. B 89, 125432 (2014).10.1103/PhysRevB.89.125432 ↗