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27 papers · 2 filters
Generation of polarization entanglement from spatially-correlated photons in spontaneous parametric down-conversion
Ryosuke Shimizu, Takashi Yamaguchi, Yasuyoshi Mitsumori +2
We propose a novel scheme to generate polarization entanglement from spatially-correlated photon pairs. We experimentally realized a scheme by means of a spatial correlation effect…
Entanglement generation using silicon wire waveguide
Hiroki Takesue, Yasuhiro Tokura, Hiroshi Fukuda +4
We report the first entanglement generation experiment that utilizes a silicon waveguide. Using spontaneous four-wave mixing in a 1.09-cm-long silicon wire waveguide, we generated…
Coherent transfer of light polarization to electron spins in a semiconductor
Hideo Kosaka, Hideki Shigyou, Yasuyoshi Mitsumori +5
We demonstrate that the superposition of light polarization states is coherently transferred to electron spins in a semiconductor quantum well. By using time-resolved Kerr rotation…
Entanglement of multiparty stabilizer, symmetric, and antisymmetric states
M. Hayashi, D. Markham, M. Murao +2
We study various distance-like entanglement measures of multipartite states under certain symmetries. Using group averaging techniques we provide conditions under which the relativ…
High-fidelity continuous-variable quantum teleportation toward multi-step quantum operations
Mitsuyoshi Yukawa, Hugo Benichi, Akira Furusawa
The progress in quantum operations of continuous-variable (CV) schemes can be reduced to that in CV quantum teleportation. The fidelity of quantum teleportation of an optical setup…
Teleportation of qubit states through dissipative channels: Conditions for surpassing the no-cloning limit
Sahin Kaya Ozdemir, Karol Bartkiewicz, Yu-xi Liu +1
We investigate quantum teleportation through dissipative channels and calculate teleportation fidelity as a function of damping rates. It is found that the average fidelity of tele…