Researchers at the University of Innsbruck, funded by the US Army, achieved a record for the transfer of quantum entanglement between matter and light -- a distance of 50 kilometers was covered using fiber optic cables. Researchers said this brings the quantum internet a step closer. In a nonlinear crystal illuminated by a strong laser the photon wavelength was converted to the optimal value for long-distance travel.
(A) A comparison diagram of the existing 3-story structure of CZTSSe solar cell (left) and the newly developed multi-story structure (right) (B) A mimetic diagram showing the differences of efficiency and uniformity between the existing 3-story structure of CZTSSe solar cell (left) and the newly developed multi-story structure (right)