Universal existence of exact quantum state transmissions in interacting media

Lian-Ao Wu, Yu-xi Liu, and Franco Nori IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain Department of Theoretical Physics and History of Science, The Basque Country University (EHU/UPV), P.O. Box 644, 48080 Bilbao, Spain Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan Institute of Microelectronics, Tsinghua University, Beijing 100084, China Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing 100084, China Center for Theoretical Physics, Physics Department, Center for the Study of Complex Systems, The University of Michigan, Ann Arbor, Michigan 48109-1120, USA Received 12 May 2009; revised manuscript received 1 July 2009; published 19 October 2009