Optical qubit generation by state truncation using an experimentally   feasible scheme
  Generation of arbitrary superposition of vacuum and one-photon states using quantum scissors device (QSD) is studied. The device allows the preparation of states by truncating an input coherent light. Optimum values of the intensity of the coherent light for the generation of any desired state using the experimentally feasible QSD scheme are found. 
Sahin Kaya Ozdemir, Adam Miranowicz, Masato Koashi, and Nobuyuki Imoto