Universal flux-based control of a $π$-SQUID
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866916137495691264 |
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| author | Staples, J. Wilson Smith, Thomas B. Doherty, Andrew C. |
| author_facet | Staples, J. Wilson Smith, Thomas B. Doherty, Andrew C. |
| contents | We describe a protocol for the universal control of non-ideal $π$-periodic superconducting qubits. Our proposal relies on a $π$-SQUID: a superconducting loop formed by two $π$-periodic circuit elements, with an external magnetic flux threading the circuit. The system exhibits an extensive sweet spot around half-flux where residual $2π$-periodic Cooper pair tunneling is highly suppressed. We demonstrate that universal single-qubit operations can be realised by tuning the flux adiabatically and diabatically within this broad sweet spot. We also assess how residual $2π$-periodicity in $π$-SQUIDs impacts holonomic phase gates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_04321 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Universal flux-based control of a $π$-SQUID Staples, J. Wilson Smith, Thomas B. Doherty, Andrew C. Quantum Physics We describe a protocol for the universal control of non-ideal $π$-periodic superconducting qubits. Our proposal relies on a $π$-SQUID: a superconducting loop formed by two $π$-periodic circuit elements, with an external magnetic flux threading the circuit. The system exhibits an extensive sweet spot around half-flux where residual $2π$-periodic Cooper pair tunneling is highly suppressed. We demonstrate that universal single-qubit operations can be realised by tuning the flux adiabatically and diabatically within this broad sweet spot. We also assess how residual $2π$-periodicity in $π$-SQUIDs impacts holonomic phase gates. |
| title | Universal flux-based control of a $π$-SQUID |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2312.04321 |