Scientists find way to improve storage time of quantum information

An international team of scientists from the University of Cambridge, the University of Linz, and the University of Sheffield has announced a breakthrough in retaining the quantum coherence of quantum dot spin qubits.

A major challenge in quantum computing is to find a spin-photon interface that is both good at storing quantum information and efficient at converting it into light. The team found out that ‘in a device constructed with semiconductor materials that have the same lattice parameter, the nuclei “felt” the same environment and behaved in unison. As a result, it is now possible to filter out this nuclear noise and achieve a near two-order magnitude improvement in storage time.’

This new method could allow for improvements in information security, the search for novel materials and chemicals, and the measurements of fundamental physical processes requiring exact temporal synchronisation among sensors.