138 citations · 397 across the 10 of their papers we have counts for
10 papers
Broadband High-Level Squeezed Light using Waveguide Optical Parametric Amplifiers with External Dispersion Compensation
Takumi Suzuki, Shotaro Oki, Kazuki Hirota +8
We demonstrate broadband phase-sensitive amplification (PSA) measurement of squeezed light generated by a waveguide optical parametric amplifier (OPA) with external dispersion comp…
Ultrafast all-optical quantum teleportation
Takumi Suzuki, Takaya Hoshi, Akito Kawasaki +13
Light's intrinsic carrier frequency of hundreds of terahertz theoretically enables information processing at terahertz clock rates. In optical quantum computing, continuous-variabl…
Generation of 10-dB squeezed light from a broadband waveguide optical parametric amplifier with improved phase locking method
Kazuki Hirota, Takahiro Kashiwazaki, Gyeongmin Ha +10
We report generation of 10.1\pm0.2-dB squeezed light from a broadband periodically poled lithium niobate (PPLN) waveguide optical parametric amplifier (OPA). Based on our previous…
All-optical measurement-device-free feedforward enabling ultra-fast quantum information processing
Taichi Yamashima, Takahiro Kashiwazaki, Takumi Suzuki +8
Optical circuit systems, unlike other systems, have the potential to perform quantum information processing (QIP) at higher clock rate than conventional processing. The approach ut…
Real-time observation of picosecond-timescale optical quantum entanglement toward ultrafast quantum information processing
Akito Kawasaki, Hector Brunel, Ryuhoh Ide +10
Entanglement is a fundamental resource of various optical quantum-information-processing (QIP) applications. Towards high-speed QIP system, entanglement should be encoded in short…
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,…
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…
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…
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…