2024-03-29T09:51:43Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/55552022-11-17T02:08:08Zhdl_2115_20057hdl_2115_148Efficiencies for the single-mode operation of a quantum optical nonlinear shift gateKojima, KunihiroHofmann, Holger F.1000080321959Takeuchi, Shigeki竹内, 繁樹1000000183822Sasaki, Keijiopen accessCopyright © 2004 American Physical Society425We investigate the single-mode operation of a quantum optical nonlinear π phase-shift gate implemented by a single two-level atom in one-dimensional free space. Since the single-mode property of the input photons at the atom is not preserved in the interaction at the atom, we analyze the efficiency of single-mode operation that can still be achieved. We show how the input pulse shape can be optimized to obtain high efficiencies for the nonlinear single-mode operation. With this analysis, we obtain an optimal single-mode transmittance per photon of 78% for the successful nonlinear π phase-shift operation.American Physical Society2004-07-23engjournal articleVoRhttp://hdl.handle.net/2115/5555http://www.aps.org/https://doi.org/10.1103/PhysRevA.70.0138101050-2947Physical Review A70013810https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/5555/1/PRA70-1.pdfapplication/pdf147.4 KB2004-07-23