Coherence limit due to hyperfine interaction with nuclei in the barrier material of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mi>Si</mml:mi></mml:math> spin qubits
Limited coherence times pose one of the biggest challenges for quantum computing with electron-spin qubits. One promising strategy to enhance the coherence of silicon spin qubits is purification of the semiconducting host material, to remove isotopes with nuclear spins. This study shows that the residual hyperfine interactions with atoms in the barrier material act as an additional source of hyperfine noise, limiting the coherence times even for present-day purification levels of ${}^{28}S\phantom{\rule{0}{0ex}}i$. Thus we should not focus solely on the silicon to improve silicon qubits.
Authors
- Lukas Cvitkovich (ORCID: https://orcid.org/0000-0003-2453-507X)
- Daniel Loss (ORCID: https://orcid.org/0000-0001-5176-3073)
- Peter Stano (ORCID: https://orcid.org/0000-0001-5835-0765)
- Yann‐Michel Niquet (ORCID: https://orcid.org/0000-0002-1846-1396)
- Tibor Grasser (ORCID: https://orcid.org/0000-0001-6536-2238)
- Christoph Wilhelmer (ORCID: https://orcid.org/0000-0002-9996-2589)
- Dominic Waldhoer (ORCID: https://orcid.org/0000-0002-8631-5681)
Institutions
- TU Wien (AT)
- University of Basel (CH)
- Slovak Academy of Sciences (SK)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- CEA Grenoble (FR)
- Institut de Recherche Interdisciplinaire de Grenoble (FR)
- RIKEN Center for Emergent Matter Science (JP)
- Université Grenoble Alpes (FR)
Publication Details
- Journal
- Physical Review Applied
- Published
- 2024-12-24
- DOI
- https://doi.org/10.1103/physrevapplied.22.064089
- Citations
- 5
- Primary Topic
- Quantum and electron transport phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.69
Funders
- European Research Council
- Japan Science and Technology Agency