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Identification of Soft Modes in Amorphous Al2O3 via First-Principles
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). University of Connecticut, USA.ORCID iD: 0000-0003-4265-1824
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). University of Connecticut, USA.
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Number of Authors: 72025 (English)In: Advanced Quantum Technologies, ISSN 2511-9044, Vol. 8, no 10, article id e2500170Article in journal (Refereed) Published
Abstract [en]

Amorphous (Formula presented.) is a fundamental component of modern superconducting qubits. While amorphous oxides offer distinct advantages, such as directional isotropy and a consistent bulk electronic gap, in realistic systems these compounds also support two-level systems (TLSs) which couple to the qubit, expediting decoherence. In this work, a first-principles study of amorphous (Formula presented.) is performed and low-energy modes are identified in the electronic and vibrational spectra as a possible origin for TLSs.

Place, publisher, year, edition, pages
2025. Vol. 8, no 10, article id e2500170
Keywords [en]
DFT calculations, oxides, quantum computing, superconducting qubits, two-level systems
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:su:diva-246294DOI: 10.1002/qute.202500170ISI: 001520470900001Scopus ID: 2-s2.0-105009853041OAI: oai:DiVA.org:su-246294DiVA, id: diva2:1994766
Available from: 2025-09-03 Created: 2025-09-03 Last updated: 2025-11-20Bibliographically approved

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Tyner, AlexanderBalatsky, Alexander V.

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Nordic Institute for Theoretical Physics (Nordita)Department of Physics
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