155 citations · 411 across the 16 of their papers we have counts for
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Boosting the generation rate of squeezed single-photon states by generalized photon subtraction
Hiroko Tomoda, Akihiro Machinaga, Kan Takase +9
In optical quantum information processing with continuous variables, optical non-Gaussian quantum states are essential for universal and fault-tolerant quantum computation. Experim…
Sequential and Programmable Squeezing Gates for Optical Non-Gaussian Input States
Takato Yoshida, Daichi Okuno, Takahiro Kashiwazaki +6
Quantum computing has been pursued with various hardware platforms, and an optical system is one of the most reasonable choices for large-scale computation. In the optical continuo…
High-rate Generation and State Tomography of Non-Gaussian Quantum States for Ultra-fast Clock Frequency Quantum Processors
Akito Kawasaki, Ryuhoh Ide, Hector Brunel +16
Quantum information processors greatly benefit from high clock frequency to fully harnessing the quantum advantages before they get washed out by the decoherence. In this pursuit,…
Time-domain programmable beam-splitter operations for an optical phase-sensitive non-Gaussian state
Daichi Okuno, Takato Yoshida, Ryoko Arita +7
We present a loop-based optical processor enabling time-domain programmable beam-splitter (BS) operations for a phase-sensitive non-Gaussian state. The loop itself is of high quali…
Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
Shunya Konno, Warit Asavanant, Fumiya Hanamura +14
A quantum computer with low-error, high-speed quantum operations and capability for interconnections is required for useful quantum computations. A logical qubit called Gottesman-K…
Single-shot single-mode optical two-parameter displacement estimation beyond classical limit
Fumiya Hanamura, Warit Asavanant, Seigo Kikura +8
Uncertainty principle prohibits the precise measurement of both components of displacement parameters in phase space. We have theoretically shown that this limit can be beaten usin…
Superconducting wide strip photon detector with high critical current bank structure
Masahiro Yabuno, Fumihiro China, Hirotaka Terai +1
Superconducting strip single-photon detectors offer excellent photon detection performance and are indispensable tools for cutting-edge optical science and technologies, including…
Quantum arbitrary waveform generator
Kan Takase, Akito Kawasaki, Byung Kyu Jeong +13
Controlling the waveform of light is the key for a versatile light source in classical and quantum electronics. Although pulse shaping of classical light is a mature technique and…
Generation of Highly Pure Single-Photon State at Telecommunication Wavelength
Akito Kawasaki, Kan Takase, Takefumi Nomura +8
Telecommunication wavelength with well-developed optical communication technologies and low losses in the waveguide are advantageous for quantum applications. However, an experimen…
Generation of Schrödinger cat states with Wigner negativity using continuous-wave low-loss waveguide optical parametric amplifier
Kan Takase, Akito Kawasaki, Byung Kyu Jeong +13
Continuous-wave (CW) squeezed light is used in generation of various optical quantum states thus is a fundamental resource of fault-tolerant universal quantum computation using opt…
Generation of spectrally factorable photon pairs via multi-order quasi-phase-matched spontaneous parametric downconversion
Fumihiro Kaneda, Jo Oikawa, Masahiro Yabuno +5
For advanced quantum information technology, sources of photon pairs in quantum mechanically factorable states are of great importance for realizing high-fidelity photon-photon qua…
Quantum detector tomography of superconducting nanostrip photon-number-resolving detector
Mamoru Endo, Tatsuki Sonoyama, Mikihisa Matsuyama +6
Superconducting nanostrip photon detectors have been used as single photon detectors, which can discriminate only photons' presence or absence. It has recently been found that they…
Massive-mode polarization entangled biphoton frequency comb
Tomohiro Yamazaki, Rikizo Ikuta, Toshiki Kobayashi +5
A frequency-multiplexed entangled photon pair and a high-dimensional hyperentangled photon pair are useful to realize a high-capacity quantum communication. A biphoton frequency co…
Spectral characterization of photon-pair sources via classical sum-frequency generation
Fumihiro Kaneda, Jo Oikawa, Masahiro Yabuno +5
Tailoring spectral properties of photon pairs is of great importance for optical quantum information and measurement applications. High-resolution spectral measurement is a key tec…
Quantum optical synthesis in 2D time-frequency space
Rui-Bo Jin, Kurumi Tazawa, Naoto Asamura +6
Conventional optical synthesis, the manipulation of the phase and amplitude of spectral components to produce an optical pulse in different temporal modes, is revolutionizing ultra…