The Optimization of Flux Trajectories for the Adiabatic Controlled-Z Gate on Split-Tunable Transmons
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arXiv
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| Format: | Preprint |
| Published: |
2021
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| _version_ | 1866916442169933824 |
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| author | Dheer, Vihaan |
| author_facet | Dheer, Vihaan |
| contents | In a system of two tunable-frequency qubits, it is well-known that adiabatic tuning into strong coupling-interaction regions between the qubit subspace and the rest of the Hilbert space can be used to generate an effective controlled Z rotation. We address the problem of determining a preferable adiabatic trajectory along which to tune the qubit frequency, and apply this to the flux-tunable transmon model. The especially minimally anharmonic nature of these quantum processors makes them good candidates for qubit control using non-computational states, as long as higher-level leakage is properly addressed. While the statement of this method has occurred multiple times in literature, there has been little discussion of which trajectories may be used. We present a generalized method for optimizing parameterized families of possible flux trajectories and provide examples of use on five test families of one and two parameters. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2112_06067 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | The Optimization of Flux Trajectories for the Adiabatic Controlled-Z Gate on Split-Tunable Transmons Dheer, Vihaan Quantum Physics In a system of two tunable-frequency qubits, it is well-known that adiabatic tuning into strong coupling-interaction regions between the qubit subspace and the rest of the Hilbert space can be used to generate an effective controlled Z rotation. We address the problem of determining a preferable adiabatic trajectory along which to tune the qubit frequency, and apply this to the flux-tunable transmon model. The especially minimally anharmonic nature of these quantum processors makes them good candidates for qubit control using non-computational states, as long as higher-level leakage is properly addressed. While the statement of this method has occurred multiple times in literature, there has been little discussion of which trajectories may be used. We present a generalized method for optimizing parameterized families of possible flux trajectories and provide examples of use on five test families of one and two parameters. |
| title | The Optimization of Flux Trajectories for the Adiabatic Controlled-Z Gate on Split-Tunable Transmons |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2112.06067 |