257 citations · 1.2k across the 15 of their papers we have counts for
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Two-photon comb with wavelength conversion and 20-km distribution for quantum communication
Kazuya Niizeki, Daisuke Yoshida, Ko Ito +6
Quantum computing and quantum communication, have been greatly developed in recent years and expected to contribute to quantum internet technologies, including cloud quantum comput…
Ultrabright narrow-band telecom two-photon source for long-distance quantum communication
Kazuya Niizeki, Kohei Ikeda, Mingyang Zheng +7
We demonstrate an ultrabright narrow-band two-photon source at the 1.5 -μm telecom wavelength for long-distance quantum communication. By utilizing a bow-tie cavity, we obtain a ca…
Faraday Rotation with Single Nuclear Spin Qubit in a High-Finesse Optical Cavity
Nobuyuki Takei, Makoto Takeuchi, Yujiro Eto +4
When an off-resonant light field is coupled with atomic spins, its polarization can rotate depending on the direction of the spins via a Faraday rotation which has been used for mo…
Single Nuclear Spin Cavity QED
Makoto Takeuchi, Nobuyuki Takei, Kodai Doi +3
We constructed a cavity QED system with a diamagnetic atom of 171Yb and performed projective measurements on a single nuclear spin. Since Yb has no electronic spin and has 1/2 nucl…
Demonstration of deterministic and high fidelity squeezing of quantum information
Jun-ichi Yoshikawa, Toshiki Hayashi, Takayuki Akiyama +4
By employing at recent proposal (R. Filip, P. Marek and U.L. Andersen, Phys. Rev. A {\bf 71}, 042308 (2005) \cite{Filip05.pra}), we experimentally demonstrate a universal, determin…
Time domain Einstein-Podolsky-Rosen correlation
Nobuyuki Takei, Noriyuki Lee, Daiki Moriyama +2
We experimentally demonstrate creation and characterization of Einstein-Podolsky-Rosen (EPR) correlation between optical beams in the time domain. The correlated beams are created…