Undetectable quantum transfer through a continuum
  We demonstrate that a quantum particle, initially prepared in a quantum well, can propagate through a reservoir with a continuous spectrum and reappear in a distant well without being registered in the reservoir. It is shown that such a passage through the reservoir takes place even if the latter is {\em continuously} monitored. We discuss a possible experimental realization of such a teleportation phenomenon in mesoscopic systems. 
Jing Ping, Yin Ye, Xin-Qi Li, YiJing Yan, and Shmuel Gurvitz
quant-ph cond-mat.mes-hall physics.optics