Quantum computers rely on qubits as their units of information. To connect them into a larger network across long distances, they need to transmit quantum information using light.
Scientists are developing ways to do this using tiny defects in diamond crystals and other semiconductor materials that can act as qubits. However, there is a major problem. Unwanted defects and trapped electrical charges can cause fluctuations that change the frequency of light emitted by the qubits, making it harder to establish reliable quantum connections.
In new research published in the journal Nature, scientists have demonstrated a promising way to get around this instability problem by using a custom-designed molecular system that contains a stable qubit.







