Ultrafast optical signature of quantum superpositions in a nanostructure
  We propose an unambiguous signature for detecting quantum superposition states in a nanostructure, based on current ultrafast spectroscopy techniques. The reliable generation of such superposition states via Hadamard-like quantum gates is crucial for implementing solid-state based quantum information schemes. The signature originates from a remarkably strong photon antibunching effect which is enhanced by non-Markovian dynamics. 
F.J. Rodriguez (1), L. Quiroga (1) and N.F. Johnson (2) ((1)   Departamento de Fisica, Universidad de Los Andes, (2) Physics...