Science Alert:  One of the key challenges of getting quantum computing working in a practical and useful way is to do with temperature – being able to put together a machine that doesn’t need ultra-low, laboratory-maintained temperatures to stay stable enough to operate.
 Now scientists have found a new technique to get qubits, the basic building blocks of quantum computing, working at room temperature. That means we’re a significant step closer to quantum computing for the masses.
 While most qubits to date operate on superconducting materials or as single atoms, here the team explored the use of defects in silicon carbide (SiC) to hold qubits instead – a simpler and more cost-effective way of getting qubits running as required.
 Although SiC has been explored as a qubit-holding material before, the problem has been in getting these qubits stable enough to use. The new research identifies the structural tweaks needed to make the formula work. “It was previously proved that six peaks are observed in the luminescence of SiC, named from PL1 to PL6, respectively.
We found out that this is due to a specific defect, where a single displaced atomic layer, called a stacking fault, appears near two vacant positions in the lattice.”