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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2312.04321 |
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Table of 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.