252 citations · 3.4k across the 59 of their papers we have counts for
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Observation of two output light pulses from a partial wavelength converter preserving phase of an input light at a single-photon level
Rikizo Ikuta, Toshiki Kobayashi, Hiroshi Kato +9
We experimentally demonstrate that both a converted and an unconverted light pulses after wavelength conversion with various conversion efficiencies preserve phase information of a…
Robustness of quantum communication based on a decoherence-free subspace using a counter-propagating weak coherent light pulse
Hidetoshi Kumagai, Takashi Yamamoto, Masato Koashi +1
We study distribution schemes for a polarization entangled photon pair based on a decoherence-free subspace over lossy quantum channels and propose an efficient scheme that is robu…
Universal gates for transforming multipartite entangled Dicke states
Toshiki Kobayashi, Rikizo Ikuta, Sahin Kaya Ozdemir +4
We determine the minimal number of qubits that it is necessary to have access to in order to transform Dicke states into other Dicke states. In general, the number of qubits in Dic…
Non-classical two-photon interference between independent telecom light pulses converted by difference-frequency generation
Rikizo Ikuta, Toshiki Kobayashi, Hiroshi Kato +9
We experimentally demonstrated the Hong-Ou-Mandel (HOM) interference between two photons after visible-to-telecommunication wavelength conversion. In the experiment, we prepared a…