Entanglement swapping and testing quantum steering into the past via collective decay

Yueh-Nan Chen,1,* Shin-Liang Chen,1 Neill Lambert,2 Che-Ming Li,3 Guang-Yin Chen,4 and Franco Nori2,5 1Department of Physics and National Center for Theoretical Sciences, National Cheng-Kung University, Tainan 701, Taiwan 2CEMS, RIKEN, Saitama, 351-0198, Japan 3Department of Engineering Science, National Cheng-Kung University, Tainan 701, Taiwan 4Department of Physics, National Chung Hsing University, Taichung 402, Taiwan 5Physics Department, University of Michigan, Ann Arbor, Michigan 48109-1040, USA (Received 30 May 2013; published 18 November 2013)