Impact of electrostatic crosstalk on spin qubits in dense CMOS quantum dot arrays
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866909321454944256 |
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| author | Cifuentes, Jesus D. Tanttu, Tuomo Steinacker, Paul Serrano, Santiago Hansen, Ingvild Slack-Smith, James P. Gilbert, Will Huang, Jonathan Y. Vahapoglu, Ensar Leon, Ross C. C. Stuyck, Nard Dumoulin Itoh, Kohei Abrosimov, Nikolay Pohl, Hans-Joachim Thewalt, Michael Laucht, Arne Yang, Chih Hwan Escott, Christopher C. Hudson, Fay E. Lim, Wee Han Rahman, Rajib Dzurak, Andrew S. Saraiva, Andre |
| author_facet | Cifuentes, Jesus D. Tanttu, Tuomo Steinacker, Paul Serrano, Santiago Hansen, Ingvild Slack-Smith, James P. Gilbert, Will Huang, Jonathan Y. Vahapoglu, Ensar Leon, Ross C. C. Stuyck, Nard Dumoulin Itoh, Kohei Abrosimov, Nikolay Pohl, Hans-Joachim Thewalt, Michael Laucht, Arne Yang, Chih Hwan Escott, Christopher C. Hudson, Fay E. Lim, Wee Han Rahman, Rajib Dzurak, Andrew S. Saraiva, Andre |
| contents | Quantum processors based on integrated nanoscale silicon spin qubits are a promising platform for highly scalable quantum computation. Current CMOS spin qubit processors consist of dense gate arrays to define the quantum dots, making them susceptible to crosstalk from capacitive coupling between a dot and its neighbouring gates. Small but sizeable spin-orbit interactions can transfer this electrostatic crosstalk to the spin g-factors, creating a dependence of the Larmor frequency on the electric field created by gate electrodes positioned even tens of nanometers apart. By studying the Stark shift from tens of spin qubits measured in nine different CMOS devices, we developed a theoretical frawework that explains how electric fields couple to the spin of the electrons in increasingly complex arrays, including those electric fluctuations that limit qubit dephasing times $T_2^*$. The results will aid in the design of robust strategies to scale CMOS quantum technology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_01849 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Impact of electrostatic crosstalk on spin qubits in dense CMOS quantum dot arrays Cifuentes, Jesus D. Tanttu, Tuomo Steinacker, Paul Serrano, Santiago Hansen, Ingvild Slack-Smith, James P. Gilbert, Will Huang, Jonathan Y. Vahapoglu, Ensar Leon, Ross C. C. Stuyck, Nard Dumoulin Itoh, Kohei Abrosimov, Nikolay Pohl, Hans-Joachim Thewalt, Michael Laucht, Arne Yang, Chih Hwan Escott, Christopher C. Hudson, Fay E. Lim, Wee Han Rahman, Rajib Dzurak, Andrew S. Saraiva, Andre Mesoscale and Nanoscale Physics Quantum Physics Quantum processors based on integrated nanoscale silicon spin qubits are a promising platform for highly scalable quantum computation. Current CMOS spin qubit processors consist of dense gate arrays to define the quantum dots, making them susceptible to crosstalk from capacitive coupling between a dot and its neighbouring gates. Small but sizeable spin-orbit interactions can transfer this electrostatic crosstalk to the spin g-factors, creating a dependence of the Larmor frequency on the electric field created by gate electrodes positioned even tens of nanometers apart. By studying the Stark shift from tens of spin qubits measured in nine different CMOS devices, we developed a theoretical frawework that explains how electric fields couple to the spin of the electrons in increasingly complex arrays, including those electric fluctuations that limit qubit dephasing times $T_2^*$. The results will aid in the design of robust strategies to scale CMOS quantum technology. |
| title | Impact of electrostatic crosstalk on spin qubits in dense CMOS quantum dot arrays |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2309.01849 |