The company recently published a paper describing its latest developments which present significant advancements beyond the state of the art. In the paper called
“Highly resilient, error-protected quantum gates in a solid-state quantum network node” the company presents for single qubit and two-qubits implemented on solid-state nitrogen-vacancy (NV) center in diamond an improvement of error per gate by a factor of 9, corresponding to a fidelity of 99.9988%.
These results establish a new state-of-the-art benchmark and demonstrate that NV centers can support gate fidelities competitive with leading superconducting and trapped-ion platforms while offering unique advantages for quantum networking, including optical connectivity and long-lived nuclear memories.
Here is the overview of the results:
High-fidelity quantum gates are a cornerstone of any quantum computing and communications architecture. Realizing such control in the presence of realistic errors at the level required for beyond-threshold quantum error correction is a long-standing challenge for all quantum hardware platforms. Here we theoretically develop and experimentally demonstrate error-protected quantum gates in a solid-state quantum network node. Our work combines room-temperature randomized benchmarking with a new class of composite pulses that are simultaneously robust to frequency and amplitude, affecting random and systematic errors. We introduce Power-Unaffected, Doubly-Detuning-Insensitive Gates (PUDDINGs) - a theoretical framework for constructing conditional gates with immunity to both amplitude and frequency errors. For single-qubit and two-qubit CNOT gate demonstrations in a solid-state nitrogen-vacancy (NV) center in diamond, we systematically measure an improvement in the error per gate up to a factor of 9. By projecting the application of PUDDING to cryogenic temperatures we show a record two-qubit error per gate of 1.2X10-5 , corresponding to a fidelity of 99.9988% , far below the thresholds required by surface and color code error correction. These results present viable building blocks for a new class of fault-tolerant quantum networks and represent the first experimental realization of error-protected conditional gates in solid-state systems.
The full article can be downloaded from the following address:
https://arxiv.org/abs/2512.05322(si apre in una nuova finestra) The effects of the results on the industry:
More broadly, the convergence of precise pulse engineering, detailed noise modeling, and quantitative benchmarking realized in our work marks a significant step toward practical, distributed quantum computing. We expect the ideas introduced in this work to inform the design of robust conditional gates across a wide variety of quantum technologies and to play a central role in the development of scalable, fault-tolerant quantum network architectures.
