Experimental realization of the one qubit Deutsch-Jozsa algorithm in a   quantum dot
  We perform quantum interference experiments on a single self-assembled semiconductor quantum dot. The presence or absence of a single exciton in the dot provides a qubit that we control with femtosecond time resolution. We combine a set of quantum operations to realize the single-qubit Deutsch-Jozsa algorithm. The results show the feasibility of single qubit quantum logic in a semiconductor quantum dot using ultrafast optical control. 
P. Bianucci, A. Muller, C. K. Shih, Q. Q. Wang, X. K. Xue, C.   Piermarocchi