81 citations · 421 across the 9 of their papers we have counts for
9 papers
All-optical storage of phase-sensitive quantum states of light
Yosuke Hashimoto, Takeshi Toyama, Jun-ichi Yoshikawa +6
We experimentally demonstrate storage and on-demand release of phase-sensitive, photon-number superposition states of the form for an optical quant…
Quantum Nondemolition Gate Operations and Measurements in Real Time on Fluctuating Signals
Yu Shiozawa, Jun-ichi Yoshikawa, Shota Yokoyama +10
We demonstrate an optical quantum nondemolition (QND) interaction gate with a bandwidth of about 100 MHz. Employing this gate, we are able to perform QND measurements in real time…
Heralded creation of photonic qudits from parametric down conversion using linear optics
Jun-ichi Yoshikawa, Marcel Bergmann, Peter van Loock +7
We propose an experimental scheme to generate, in a heralded fashion, arbitrary quantum superpositions of two-mode optical states with a fixed total photon number based on weak…
Direct observation of phase sensitive Hong-Ou-Mandel interference
Petr Marek, Petr Zapletal, Radim Filip +5
Quality of individual photons and their ability to interfere is traditionally tested by measuring the Hong-Ou-Mandel photon bunching effect. However, this phase insensitive measure…
Creation and Measurement of Broadband Squeezed Vacuum from a Ring Optical Parametric Oscillator
Takahiro Serikawa, Jun-ichi Yoshikawa, Kenzo Makino +1
We report a 65MHz-bandwidth triangular-shaped optical parametric oscillator (OPO) for squeezed vacuum generation at 860nm. The triangle structure of our OPO enables the round-trip…
Synchronization of optical photons for quantum information processing
Kenzo Makino, Yosuke Hashimoto, Jun-ichi Yoshikawa +4
A fundamental element of quantum information processing with photonic qubits is the nonclassical quantum interference between two photons when they bunch together via the Hong-Ou-M…
Real-Time Quadrature Measurement of a Single-Photon Wavepacket with Continuous Temporal-Mode-Matching
Hisashi Ogawa, Hideaki Ohdan, Kazunori Miyata +5
Real-time controls based on quantum measurements are powerful tools for various quantum protocols. However, their experimental realization have been limited by mode-mismatch betwee…
Creation, storage, and on-demand release of optical quantum states with a negative Wigner function
Jun-ichi Yoshikawa, Kenzo Makino, Shintaro Kurata +2
Highly nonclassical quantum states of light, characterized by Wigner functions with negative values, have been created so far only in a heralded fashion. In this case, the desired…
Quantum-Limited Mirror-Motion Estimation
Kohjiro Iwasawa, Kenzo Makino, Hidehiro Yonezawa +4
We experimentally demonstrate optomechanical motion and force measurements near the quantum precision limits set by the quantum Cramér-Rao bounds (QCRBs). Optical beams in coherent…