138 citations · 404 across the 9 of their papers we have counts for
9 papers
133-Tbps 1040-km (1380 km) Lumped-Amplified Transmission Over 22 THz in S-to-U-Band Using Hybrid Multiband Repeater with PPLN-Based Optical Parametric Amplifiers and EDFAs
Shimpei Shimizu, Takayuki Kobayashi, Masashi Abe +14
We demonstrated 22.05-THz four-band long-haul transmission with a S-to-U-band lumped repeater consisting of PPLN-based optical parametric amplifiers and EDFAs over an 80-km-span SM…
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…
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…
43-GHz bandwidth real-time amplitude measurement of 5-dB squeezed light using modularized optical parametric amplifier with 5G technology
Asuka Inoue, Takahiro Kashiwazaki, Taichi Yamashima +7
Continuous-variable optical quantum information processing (CVOQIP), where quantum information is encoded in a traveling wave of light called a flying qubit, is a candidate for a p…
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…
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…