Fast Mølmer-Sørensen gates in trapped-ion quantum processors with compensated carrier transition
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912513930559488 |
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| author | Anikin, Evgeny Chuchalin, Andrey Morozov, Nikita Lakhmanskaya, Olga Lakhmanskiy, Kirill |
| author_facet | Anikin, Evgeny Chuchalin, Andrey Morozov, Nikita Lakhmanskaya, Olga Lakhmanskiy, Kirill |
| contents | Carrier transition is one of the major factors hindering the high-speed implementation of the Mølmer-Sørensen gates in trapped-ion quantum processors. We present an approach to design laser pulse shapes for the Mølmer-Sørensen gate in ion chains which accounts for the effect of carrier transition on qubit-phonon dynamics. We show that the fast-oscillating carrier term effectively modifies the spin-dependent forces acting on ions, and this can be compensated by a simple nonlinear transformation of a laser pulse. Using numerical simulations for short ion chains and perturbation theory for longer chains up to $20$ ions, we demonstrate that our approach allows to reach the infidelity below $10^{-4}$ while keeping the gate duration of the order of tens of microseconds. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_02387 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fast Mølmer-Sørensen gates in trapped-ion quantum processors with compensated carrier transition Anikin, Evgeny Chuchalin, Andrey Morozov, Nikita Lakhmanskaya, Olga Lakhmanskiy, Kirill Quantum Physics Carrier transition is one of the major factors hindering the high-speed implementation of the Mølmer-Sørensen gates in trapped-ion quantum processors. We present an approach to design laser pulse shapes for the Mølmer-Sørensen gate in ion chains which accounts for the effect of carrier transition on qubit-phonon dynamics. We show that the fast-oscillating carrier term effectively modifies the spin-dependent forces acting on ions, and this can be compensated by a simple nonlinear transformation of a laser pulse. Using numerical simulations for short ion chains and perturbation theory for longer chains up to $20$ ions, we demonstrate that our approach allows to reach the infidelity below $10^{-4}$ while keeping the gate duration of the order of tens of microseconds. |
| title | Fast Mølmer-Sørensen gates in trapped-ion quantum processors with compensated carrier transition |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2501.02387 |