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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We describe high-fidelity entangling gates between singlet-triplet qubits(STQs) which are coupled via one quantum state (QS). The QS can be provided bya quantum dot itself or by another confined system. The orbital energies of theQS are tunable using an electric gate close to the QS, which changes theinteractions between the STQs independent of their single-qubit parameters.Short gating sequences exist for the controlled NOT (CNOT) operations. We showthat realistic quantum dot setups permit excellent entangling operations withgate infidelities below $10^{-3}$, which is lower than the quantum errorcorrection threshold of the surface code. We consider limitations fromfabrication errors, hyperfine interactions, spin-orbit interactions, and chargenoise in GaAs and Si heterostructures.

Two-Qubit Couplings of Singlet-Triplet Qubits Mediated by One Quantum State