Enhanced quantum teleportation in the background of Schwarzschild spacetime by weak measurements Xing Xiao, Yao Yao, Yan-Ling Li and Ying-Mao Xie Eur. Phys. J. Plus, 135 1 (2020) 79 Published online: 17 January 2020 DOI: 10.1140/epjp/s13360-019-00010-5