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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2407.02722 |
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| _version_ | 1866918037411594240 |
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| author | Ding, Qi Oppenheim, Alan V. Boufounos, Petros T. Gustavsson, Simon Grover, Jeffrey A. Baran, Thomas A. Oliver, William D. |
| author_facet | Ding, Qi Oppenheim, Alan V. Boufounos, Petros T. Gustavsson, Simon Grover, Jeffrey A. Baran, Thomas A. Oliver, William D. |
| contents | Despite progress towards achieving low error rates with superconducting qubits, error-prone two-qubit gates remain a bottleneck for realizing large-scale quantum computers. Therefore, a systematic framework to design high-fidelity gates becomes imperative. One type of two-qubit gate in superconducting qubits is the controlled-phase (CPHASE) gate, which utilizes a conditional interaction between higher energy levels of the qubits controlled by a baseband flux pulse on one of the qubits or a tunable coupler. In this work, we study an adiabatic implementation of CPHASE gates and formulate the design of the control trajectory for the gate as a pulse-design problem. We show in simulation that the Chebyshev-based trajectory can, in certain cases, enable gates with gate infidelity lower by an average of 23.3% when compared to the widely used Slepian-based trajectory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_02722 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pulse Design of Baseband Flux Control for Adiabatic Controlled-Phase Gates in Superconducting Circuits Ding, Qi Oppenheim, Alan V. Boufounos, Petros T. Gustavsson, Simon Grover, Jeffrey A. Baran, Thomas A. Oliver, William D. Quantum Physics Despite progress towards achieving low error rates with superconducting qubits, error-prone two-qubit gates remain a bottleneck for realizing large-scale quantum computers. Therefore, a systematic framework to design high-fidelity gates becomes imperative. One type of two-qubit gate in superconducting qubits is the controlled-phase (CPHASE) gate, which utilizes a conditional interaction between higher energy levels of the qubits controlled by a baseband flux pulse on one of the qubits or a tunable coupler. In this work, we study an adiabatic implementation of CPHASE gates and formulate the design of the control trajectory for the gate as a pulse-design problem. We show in simulation that the Chebyshev-based trajectory can, in certain cases, enable gates with gate infidelity lower by an average of 23.3% when compared to the widely used Slepian-based trajectory. |
| title | Pulse Design of Baseband Flux Control for Adiabatic Controlled-Phase Gates in Superconducting Circuits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2407.02722 |