Role of anomalous symmetry in 0-$\pi$ qubits

• URL: http://arxiv.org/abs/2109.11824v2
• Date: Wed, 4 May 2022 15:28:51 GMT
• Title: Role of anomalous symmetry in 0-$\pi$ qubits
• Authors: I.L. Egusquiza, A. I\~niguez, E. Rico, A. Villarino
• Abstract summary: We present an exact full symmetry analysis of the 0-$pi$ superconducting circuit. We show, both analytically and numerically, how this anomalous symmetry is maintained in the low-energy sector.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We present an exact full symmetry analysis of the 0-$\pi$ superconducting circuit. We identify points in control parameter space of enhanced anomalous symmetry, which imposes robust twofold degeneracy of its ground state, that is for all values of the energy parameters of the model. We show, both analytically and numerically, how this anomalous symmetry is maintained in the low-energy sector, thus providing us with a strong candidate for robust qubit engineering.

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