323 citations · 928 across the 15 of their papers we have counts for
15 papers
Observing a Phase Transition in a Coherent Ising Machine
Hiroki Takesue, Yasuhiro Yamada, Kensuke Inaba +8
A coherent Ising machine (CIM) is known to deliver the low-energy states of the Ising model. Here, we investigate how well the CIM simulates the thermodynamic properties of a two-d…
Low-loss polarization control in fiber systems for quantum computation
Tomohiro Nakamura, Takefumi Nomura, Mamoru Endo +5
Optical quantum information processing exploits interference of quantum light. However, when the interferometer is composed of optical fibers, degradation of interference visibilit…
Over-8-dB squeezed light generation by a broadband waveguide optical parametric amplifier toward fault-tolerant ultra-fast quantum computers
Takahiro Kashiwazaki, Taichi Yamashima, Koji Enbutsu +6
We achieved continuous-wave 8.3-dB squeezed light generation using a terahertz-order-broadband waveguide optical parametric amplifier (OPA) by improving a measurement setup from ou…
Non-Gaussian quantum state generation by multi-photon subtraction at the telecommunication wavelength
Mamoru Endo, Ruofan He, Tatsuki Sonoyama +12
In the field of continuous-variable quantum information processing, non-Gaussian states with negative values of the Wigner function are crucial for the development of a fault-toler…
Experimental observation of chimera states in spiking neural networks based on degenerate optical parametric oscillators
Tumi Makinwa, Kensuke Inaba, Takahiro Inagaki +9
We experimentally demonstrate that networks of identical photonic spiking neurons based on coupled degenerate parametric oscillators can show various chimera states, in which, depe…
Programmable time-multiplexed squeezed light source
Hiroko Tomoda, Takato Yoshida, Takahiro Kashiwazaki +3
One of the leading approaches to large-scale quantum information processing (QIP) is the continuous-variable (CV) scheme based on time multiplexing (TM). As a fundamental building…
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 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…
Fabrication of low-loss quasi-single-mode PPLN waveguide and its application to a modularized broadband high-level squeezer
Takahiro Kashiwazaki, Taichi Yamashima, Naoto Takanashi +3
A continuous-wave (CW) broadband high-level optical quadrature squeezer is essential for high-speed large-scale fault-tolerant quantum computing on a time-domain-multiplexed contin…
Single-cycle all-fiber frequency comb
Sida Xing, Daniel Lesko, Takeshi Umeki +4
Single-cycle pulses with deterministic carrier-envelope phase enable the study and control of light-matter interactions at the sub-cycle timescale, as well as the efficient generat…
Collective and synchronous dynamics of photonic spiking neurons
Takahiro Inagaki, Kensuke Inaba, Timothée Leleu +7
Nonlinear dynamics of spiking neural networks has recently attracted much interest as an approach to understand possible information processing in the brain and apply it to artific…
All-optical phase-sensitive detection for ultra-fast quantum computation
Naoto Takanashi, Asuka Inoue, Takahiro Kashiwazaki +5
Phase-sensitive detection is the essential projective measurement for measurement-based continuous-variable quantum information processing. The bandwidth of conventional electrical…
Continuous-wave 6-dB-squeezed light with 2.5-THz-bandwidth from single-mode PPLN waveguide
Takahiro Kashiwazaki, Naoto Takanashi, Taichi Yamashima +5
Terahertz (THz)-bandwidth continuous-wave (CW) squeezed light is essential for integrating quantum processors with time-domain multiplexing (TDM) by using optical delay line interf…
4-dB quadrature squeezing with fiber-coupled PPLN ridge waveguide module
Naoto Takanashi, Takahiro Kashiwazaki, Takushi Kazama +4
We have developed an optical parametric amplification module for quadrature squeezing with input and output ports coupled with optical fibers for both fundamental and second harmon…
Experimental investigation of performance differences between Coherent Ising Machines and a quantum annealer
Ryan Hamerly, Takahiro Inagaki, Peter L. McMahon +20
Physical annealing systems provide heuristic approaches to solving NP-hard Ising optimization problems. Here, we study the performance of two types of annealing machines--a commerc…