ArticleNature nanotechnology2025
Universal control of four singlet-triplet qubits.
Article in Nature nanotechnology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Highly Tunable Two-Qubit Interactions in Si/SiGe Quantum Dots by Interchanging the Roles of Qubit-Defining Gates.Nano letters · 2026Article
- A tri-linear quantum dot architecture for semiconductor spin qubits.Scientific reports · 2026Article
- A dressed singlet-triplet qubit in germanium.Nature communications · 2026Article
- Fully autonomous tuning of a spin qubit.Nature electronics · 2026Article
- An 11-qubit atom processor in silicon.Nature · 2025Article
- Robust and localised control of a 10-spin qubit array in germanium.Nature communications · 2025Article
- Operating two exchange-only qubits in parallel.Nature · 2025Article
- High-fidelity geometric quantum gates exceeding 99.9% in germanium quantum dots.Nature communications · 2025Article
- Polarimetry with Spins in the Solid State.Nano letters · 2025Article
- Exchange anisotropies in microwave-driven singlet-triplet qubits.Nature communications · 2025Article
- A dephasing sweet spot with enhanced dipolar coupling.Communications physics · 2025Article
- Demonstration of Microwave Resonators and Double Quantum Dots on Optimized Reverse-Graded Ge/SiGe Heterostructures.ACS applied electronic materials · 2024Article
Corrections and comments
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Authors and funding
12 authors.
Funding
Abstract
The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing and for studying quantum magnetism from the bottom up. Here we present a 2 × 4 germanium quantum dot array with full and controllable interactions between nearest-neighbour spins. As a demonstration of the level of control, we define four singlet-triplet qubits in this system and show two-axis single-qubit control of each qubit and SWAP-style two-qubit gates between all neighbouring qubit pairs, yielding average single-qubit gate fidelities of 99.49(8)-99.84(1)% and Bell state fidelities of 73(1)-90(1)%. Combining these operations, we experimentally implement a circuit designed to generate and distribute entanglement across the array. A remote Bell state with a fidelity of 75(2)% and concurrence of 22(4)% is achieved. These results highlight the potential of singlet-triplet qubits as a competing platform for quantum computing and indicate that scaling up the control of quantum dot spins in extended bilinear arrays can be feasible.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.