• Increased electron spin lifetime of quantum carbon film to 800 ns
• Improved sample-to-sample repeatability and uniformity
• Moves closer to realising quantum devices like qubits and magnetic sensors

Archer Materials Limited (ASX: AXE) has announced a breakthrough in improving the electron spin lifetime and sample-to-sample repeatability of its novel manufacturable quantum carbon film. The company has increased the spin lifetime to 800 nanoseconds (ns), up from 385 ns previously, and significantly improved the film's reproducibility from sample to sample. These advancements are crucial steps towards realising quantum devices like qubits and magnetic sensors/microscopes. The improved spin lifetimes and repeatability have been demonstrated on nanoislands of the carbon films, showing no significant change in electron spin lifetime when patterning from bulk films to nanoscale dots. Archer is now working to reproduce and translate these results from the carbon film base to silicon or quartz chips, ensuring the repeatability of the results between sample chips. Uniformity across a wafer and repeatability between sample chips are critical for reproducing the chips and realising quantum devices. Archer is also continuing work with partners at Queen Mary University of London and École Polytechnique Fédérale de Lausanne to further develop the carbon films for spin readout, quantum magnetic sensing, and qubit realisation.

Archer is working to reproduce the improved electron spin lifetime and sample-to-sample repeatability of its quantum carbon film on silicon or quartz chips, which is a critical step towards realising quantum devices like qubits and magnetic sensors/microscopes. The company is also continuing collaborative work to develop the carbon films for spin readout, quantum magnetic sensing, and qubit realisation.