Yet more qubit tech: New quantum dot options, diamond vacancies
Researchers are exploring new quantum dot and diamond defect approaches for building qubits. HRL Laboratories demonstrated a silicon‑based quantum dot system that controls electron spins via wiring instead of microwaves, operating a low‑power controller at cryogenic temperatures. Another company showcased a processor that traps 100 electrons in diamond vacancies, highlighting alternative scaling pathways.
- ▪HRL Laboratories reported a quantum dot architecture that uses three coupled electron spins and eliminates the need for microwave control lines.
- ▪The HRL system includes a low‑temperature controller built on a 130 nm process that consumes less than 3.5 watts and communicates via a superconducting ribbon cable.
- ▪The demonstrated chip contained 18 qubits and performed a simple error‑correction test.
- ▪A separate company released a processor with 100 individual electrons held in diamond defects, suggesting a different route to scalable qubit arrays.
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| Publication time | Wed, 29 Jul 2026 17:37:47 +0000 |
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Diamonds and dots Yet more qubit tech: New quantum dot options, diamond vacancies Companies are making sure we have a surplus of options for building qubits. John Timmer – Jul 29, 2026 1:37 pm | 2 HRL uses a control that's kept in the same refrigeration system as their qubits, with the two connected by a superconducting ribbon cable. Credit: HRL Laboratories HRL uses a control that's kept in the same refrigeration system as their qubits, with the two connected by a superconducting ribbon cable.
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