Balanced ternary addition using a gated silicon nanowire
  We demonstrate the proof of principle for a ternary adder using silicon metal-on-insulator single electron transistors (SET). Gate dependent rectifying behavior of a single electron transistor results in a robust three-valued output as a function of the potential of the SET island. Mapping logical, ternary inputs to the three gates controlling the potential of the SET island allows us to perform complex, inherently ternary operations, on a single transistor. 
J.A. Mol, J. van der Heijden, J. Verduijn, M. Klein, F. Remacle and S.   Rogge
cond-mat.mes-hall