Physicists from France and Switzerland have learned to store qubits with a time coding of 20 milliseconds

Physicists demonstrate the operation of quantum memory for storing time-coded qubits on a crystal151 151Eu3+:Y2SiO5They showed that such a memory is capable of storing them for up to 20 milliseconds, demonstrating an output match rate of 85 percent for one photon per qubit.

Read more at N+1: