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33 papers · 2 filters
Quantum Property Testing of Group Solvability
Yoshifumi Inui, Francois Le Gall
Testing efficiently whether a finite set with a binary operation over it, given as an oracle, is a group is a well-known open problem in the field of property testing. Recently, Fr…
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…
Storage and retrieval of nonclassical photon pairs and conditional single photons generated by parametric down-conversion process
K. Akiba, K. Kashiwagi, M. Arikawa +1
Storage and retrieval of parametric down-conversion (PDC) photons are demonstrated with electromagnetically induced transparency (EIT). Extreme frequency filtering is performed for…
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…