Hybrid-integrable, scalable, robust, energy-efficient, near-room-temperature solid-state diamond-spin-photon-based quantum computers

https://www.eurekalert.org/news-releases/1088674

"longer operation times/ lower error rates outperform superconducting systems... qubit registers created using color centers in diamond/ surrounding nuclear spins, photonic-coupled via microresonators distributed across multiple registers/ distances >20 m... 2 register entanglement, each with six qubits,  >0.9 average fidelity...germanium/ tin vacancy defects, capable serving as qubits, in detectors/ sources, high Q-factors in diamond microresonators, 12 qubits, single-qubit gate error rates <0.5%, >10 ms coherence time"