Identification of soft modes in amorphous Al$_{2}$O$_{3}$ via first-principles
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866918139231469568 |
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| author | Tyner, Alexander C. Heath, Joshuah T. Thann, Thue Christian Michal, Vincent P. Krogstrup, Peter Svendsen, Mark Kamper Balatsky, Alexander V. |
| author_facet | Tyner, Alexander C. Heath, Joshuah T. Thann, Thue Christian Michal, Vincent P. Krogstrup, Peter Svendsen, Mark Kamper Balatsky, Alexander V. |
| contents | Amorphous Al$_{2}$O$_{3}$ is a fundamental component of modern superconducting qubits. While amphorphous oxides offer distinct advantages, such as directional isotropy and a consistent bulk electronic gap, in realistic systems these compounds support two-level systems (TLSs) which couple to the qubit, expediting decoherence. In this work, we perform a first-principles study of amorphous Al$_{2}$O$_{3}$ and identify low-energy modes in the electronic and phonon spectra as a possible origin for TLSs. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2502_14823 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Identification of soft modes in amorphous Al$_{2}$O$_{3}$ via first-principles Tyner, Alexander C. Heath, Joshuah T. Thann, Thue Christian Michal, Vincent P. Krogstrup, Peter Svendsen, Mark Kamper Balatsky, Alexander V. Mesoscale and Nanoscale Physics Disordered Systems and Neural Networks Materials Science Quantum Physics Amorphous Al$_{2}$O$_{3}$ is a fundamental component of modern superconducting qubits. While amphorphous oxides offer distinct advantages, such as directional isotropy and a consistent bulk electronic gap, in realistic systems these compounds support two-level systems (TLSs) which couple to the qubit, expediting decoherence. In this work, we perform a first-principles study of amorphous Al$_{2}$O$_{3}$ and identify low-energy modes in the electronic and phonon spectra as a possible origin for TLSs. |
| title | Identification of soft modes in amorphous Al$_{2}$O$_{3}$ via first-principles |
| topic | Mesoscale and Nanoscale Physics Disordered Systems and Neural Networks Materials Science Quantum Physics |
| url | https://arxiv.org/abs/2502.14823 |