NVision Quantum designs molecule for qubit function

The team reports achieving millisecond-scale retention of a quantum state, a duration significantly longer than many current qubit technologies allow for more complex calculations before decoherence. This molecular qubit, detailed in a paper published in Nature, uses light for preparation and readout, offering a photonic interface that could simplify scaling of quantum systems. “Our team started with a list of the properties a quantum computer needs, then designed a molecule to have them,” explains the team. This extended coherence is partially attributed to the molecule’s design, which separates its spin states in energy, effectively shielding the quantum information from disruptive magnetic fields originating from nearby hydrogen atoms. Achieving this level of isolation is critical, as even weak magnetic interference can quickly degrade the delicate quantum state. The molecular qubit: a carbene designed so its spin can be read and controlled with light. Adapted from Roggors et al., Nature (2026). — Source: nvision-quantum.com The architecture, dubbed PIQC, uses a dual functionality within each molecule; the electron spin is the interface for light-based communication and qubit connectivity, while…