Injection of a single electron from static to moving quantum dots
  We study the injection mechanism of a single electron from a static quantum dot into a moving quantum dot created in a long depleted channel with surface acoustic waves (SAWs). We demonstrate that such a process is characterized by an activation law with a threshold that depends on the SAW amplitude and the dot-channel potential gradient. By increasing sufficiently the SAW modulation amplitude, we can reach a regime where the transfer is unitary and potentially adiabatic. This study points at the relevant regime to use moving dots in quantum information protocols. 
Benoit Bertrand, Sylvain Hermelin, Pierre-Andr\'e Mortemousque,   Shintaro Takada, Michihisa Yamamoto, Seigo Tarucha, Arne L...
cond-mat.mes-hall