Identification of Soft Modes in Amorphous Al2O3 via First-PrinciplesShow others and affiliations
2025 (English)In: Advanced Quantum Technologies, E-ISSN 2511-9044, Vol. 8, no 10, article id e2500170Article in journal (Refereed) Published
Abstract [en]
Amorphous Al2O3 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 Al2O3 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
Wiley , 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 Other Physics Topics
Identifiers
URN: urn:nbn:se:kth:diva-368940DOI: 10.1002/qute.202500170ISI: 001520470900001Scopus ID: 2-s2.0-105009853041OAI: oai:DiVA.org:kth-368940DiVA, id: diva2:1992658
Note
QC 20260126
2025-08-282025-08-282026-01-26Bibliographically approved