2012/12/31 by Mitsuyoshi Yukawa, Kazunori Miyata, Takahiro Mizuta +4 · 2 citations
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1364/oe.21.005529
published as Optics Express, Vol. 21, Issue 5, pp. 5529-5535 (2013) · 5 pages, 2 figures
arxiv created 2013/03/06 · arxiv updated 2013/03/07
We develop an experimental scheme based on a continuous-wave (cw) laser for generating arbitrary superpositions of photon number states. In this experiment, we successfully generate superposition states of zero to three photons, namely advanced versions of superpositions of two and three coherent states. They are fully compatible with developed quantum teleportation and measurement-based quantum operations with cw lasers. Due to achieved high detection efficiency, we observe, without any loss correction, multiple areas of negativity of Wigner function, which confirm strongly nonclassical nature of the generated states.