Quantum memory scheme based on optical fibres and cavities. Unfortunately, storing bits is still not the best application of quantum memory. However, there are still several challenges to be met. Storage and retrieval of single photons transmitted between remote quantum memories. Cite this article Wang, Y. Alexander I. However, there is a major obstacle to the development of long-distance quantum telecommunication systems: beyond a few hundred kilometres, the photons are lost and the signal disappears. Optical quantum memory with generalized time-reversible atom—light interactions. In order to do this, it becomes important to find the right materials for making quantum memories. Not to be confused with Quarterdeck Expanded Memory Manager.