Finite bias charge detection in a quantum dot
  We present finite bias measurements on a quantum dot coupled capacitively to a quantum point contact used as a charge detector. The transconductance signal measured in the quantum point contact at finite dot bias shows structure which allows us to determine the time-averaged charge on the dot in the non-blockaded regime and to estimate the coupling of the dot to the leads. 
R. Schleser, E. Ruh, T. Ihn, K. Ensslin, D. C. Driscoll, and A. C.   Gossard