A singlet-triplet hole-spin qubit in MOS silicon
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866929522023071744 |
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| author | Liles, S. D. Halverson, D. J. Wang, Z. Shamim, A. Eggli, R. S. Jin, I. K. Hillier, J. Kumar, K. Vorreiter, I. Rendell, M. Huang, J. H. Escott, C. C. Hudson, F. E. Lim, W. H. Culcer, D. Dzurak, A. S. Hamilton, A. R. |
| author_facet | Liles, S. D. Halverson, D. J. Wang, Z. Shamim, A. Eggli, R. S. Jin, I. K. Hillier, J. Kumar, K. Vorreiter, I. Rendell, M. Huang, J. H. Escott, C. C. Hudson, F. E. Lim, W. H. Culcer, D. Dzurak, A. S. Hamilton, A. R. |
| contents | Holes in silicon quantum dots are promising for spin qubit applications due to the strong intrinsic spin-orbit coupling. The spin-orbit coupling produces complex hole-spin dynamics, providing opportunities to further optimize spin qubits. Here, we demonstrate a singlet-triplet qubit using hole states in a planar metal-oxide-semiconductor double quantum dot. We observe rapid qubit control with singlet-triplet oscillations up to 400 MHz. The qubit exhibits promising coherence, with a maximum dephasing time of 600 ns, which is enhanced to 1.3 us using refocusing techniques. We investigate the magnetic field anisotropy of the eigenstates, and determine a magnetic field orientation to improve the qubit initialisation fidelity. These results present a step forward for spin qubit technology, by implementing a high quality singlet-triplet hole-spin qubit in planar architecture suitable for scaling up to 2D arrays of coupled qubits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_09722 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | A singlet-triplet hole-spin qubit in MOS silicon Liles, S. D. Halverson, D. J. Wang, Z. Shamim, A. Eggli, R. S. Jin, I. K. Hillier, J. Kumar, K. Vorreiter, I. Rendell, M. Huang, J. H. Escott, C. C. Hudson, F. E. Lim, W. H. Culcer, D. Dzurak, A. S. Hamilton, A. R. Mesoscale and Nanoscale Physics Holes in silicon quantum dots are promising for spin qubit applications due to the strong intrinsic spin-orbit coupling. The spin-orbit coupling produces complex hole-spin dynamics, providing opportunities to further optimize spin qubits. Here, we demonstrate a singlet-triplet qubit using hole states in a planar metal-oxide-semiconductor double quantum dot. We observe rapid qubit control with singlet-triplet oscillations up to 400 MHz. The qubit exhibits promising coherence, with a maximum dephasing time of 600 ns, which is enhanced to 1.3 us using refocusing techniques. We investigate the magnetic field anisotropy of the eigenstates, and determine a magnetic field orientation to improve the qubit initialisation fidelity. These results present a step forward for spin qubit technology, by implementing a high quality singlet-triplet hole-spin qubit in planar architecture suitable for scaling up to 2D arrays of coupled qubits. |
| title | A singlet-triplet hole-spin qubit in MOS silicon |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2310.09722 |