Solid quantum memory progress

摘要

Harnessing entanglement between light and material systems is relevant to future quantum information technologies. Two groups report advances in the development of the light-matter quantum interface that could pave the way for the construction of multiplexed quantum repeaters for long-distance quantum networks. Clausen et al. demonstrate entanglement between a photon at the telecommunication wavelength (1,338 nanometres) and a single collective atomic excitation stored in a neodymium-doped Y_2SiO_5 crystal. Saglamyurek et al. use a thulium-doped LiNbO_3 waveguide to achieve a similar entanglement.