Operation of a high-frequency, phase-slip qubit
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866918324899676160 |
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| author | Purmessur, Cheeranjeev Chow, Kaicheung van Heck, Bernard Kou, Angela |
| author_facet | Purmessur, Cheeranjeev Chow, Kaicheung van Heck, Bernard Kou, Angela |
| contents | Aluminum-based Josephson junctions are currently the main sources of nonlinearity for control and manipulation of superconducting qubits. A phase-slip junction, the dual of a Josephson junction, provides an alternative source of nonlinearity that promises new types of protected qubits and the possibility of high-temperature and high-frequency operation through the use of superconductors with larger energy gaps. Phase-slip junctions have been challenging, however, to incorporate into superconducting qubits because of difficulty controlling junction parameters. Here we demonstrate the operation of a superconducting qubit based on a phase slip junction made using titanium nitride. We operate the qubit at zero flux where the qubit frequency (~17 GHz) is mainly determined by the inductance of the qubit. We perform readout and coherent control of the superconducting qubit, and measure qubit lifetimes >60 $μ$s. Finally, we demonstrate operation of the qubit at temperatures exceeding 300 mK. Our results add the phase-slip junction as a tool for superconducting quantum information processing and opens avenues for new classes of superconducting qubits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_07043 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Operation of a high-frequency, phase-slip qubit Purmessur, Cheeranjeev Chow, Kaicheung van Heck, Bernard Kou, Angela Superconductivity Quantum Physics Aluminum-based Josephson junctions are currently the main sources of nonlinearity for control and manipulation of superconducting qubits. A phase-slip junction, the dual of a Josephson junction, provides an alternative source of nonlinearity that promises new types of protected qubits and the possibility of high-temperature and high-frequency operation through the use of superconductors with larger energy gaps. Phase-slip junctions have been challenging, however, to incorporate into superconducting qubits because of difficulty controlling junction parameters. Here we demonstrate the operation of a superconducting qubit based on a phase slip junction made using titanium nitride. We operate the qubit at zero flux where the qubit frequency (~17 GHz) is mainly determined by the inductance of the qubit. We perform readout and coherent control of the superconducting qubit, and measure qubit lifetimes >60 $μ$s. Finally, we demonstrate operation of the qubit at temperatures exceeding 300 mK. Our results add the phase-slip junction as a tool for superconducting quantum information processing and opens avenues for new classes of superconducting qubits. |
| title | Operation of a high-frequency, phase-slip qubit |
| topic | Superconductivity Quantum Physics |
| url | https://arxiv.org/abs/2502.07043 |