English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Single-electron spin qubits employ magnetic fields on the order of 1 Tesla orabove to enable quantum state readout via spin-dependent-tunnelling. Thisrequires demanding microwave engineering for coherent spin resonance controland significant on-chip real estate for electron reservoirs, both of whichlimit the prospects for large scale multi-qubit systems. Alternatively,singlet-triplet (ST) readout enables high-fidelity spin-state measurements inmuch lower magnetic fields, without the need for reservoirs. Here, wedemonstrate low-field operation of metal-oxide-silicon (MOS) quantum dot qubitsby combining coherent single-spin control with high-fidelity, single-shot,Pauli-spin-blockade-based ST readout. We discover that the qubits decoherefaster at low magnetic fields with $T_{2}^{Rabi}=18.6$~$\mu$s and$T_2^*=1.4$~$\mu$s at 150~mT. Their coherence is limited by spin flips ofresidual $^{29}$Si nuclei in the isotopically enriched $^{28}$Si host material,which occur more frequently at lower fields. Our finding indicates that newtrade-offs will be required to ensure the frequency stabilization of spinqubits and highlights the importance of isotopic enrichment of devicesubstrates for the realization of a scalable silicon-based quantum processor.

Single-spin qubits in isotopically enriched silicon at low magnetic field