Building a large-scale quantum computer with continuous-variable optical technologies

K Fukui, S Takeda - Journal of Physics B: Atomic, Molecular and …, 2022 - iopscience.iop.org
Realizing a large-scale quantum computer requires hardware platforms that can
simultaneously achieve universality, scalability, and fault tolerance. As a viable pathway to …

[HTML][HTML] Fabrication of low-loss quasi-single-mode PPLN waveguide and its application to a modularized broadband high-level squeezer

T Kashiwazaki, T Yamashima, N Takanashi… - Applied Physics …, 2021 - pubs.aip.org
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 …

All-optical phase-sensitive detection for ultra-fast quantum computation

N Takanashi, A Inoue, T Kashiwazaki, T Kazama… - Optics …, 2020 - opg.optica.org
Phase-sensitive detection is the essential projective measurement for measurement-based
continuous-variable quantum information processing. The bandwidth of conventional …

Two-mode squeezing over deployed fiber coexisting with conventional communications

JC Chapman, A Miloshevsky, HH Lu, N Rao… - Optics …, 2023 - opg.optica.org
Squeezed light is a crucial resource for continuous-variable (CV) quantum information
science. Distributed multi-mode squeezing is critical for enabling CV quantum networks and …

All-optical measurement-device-free feedforward enabling ultra-fast quantum information processing

T Yamashima, T Kashiwazaki, T Suzuki, R Nehra… - Optics …, 2025 - opg.optica.org
Utilizing feedforward to perform adaptive quantum operations on one entangled state
according to the measurement result of the other state enables measurement-based …

Quantum state engineering in arrays of nonlinear waveguides

D Barral, M Walschaers, K Bencheikh, V Parigi… - Physical Review A, 2020 - APS
In the current quest for efficient and experimentally feasible platforms for implementation of
multimode squeezing and entanglement in the continuous variable regime, we underpin …

Programmable time-multiplexed squeezed light source

H Tomoda, T Yoshida, T Kashiwazaki, T Umeki… - Optics …, 2023 - opg.optica.org
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 …

Entanglement Assisted Squeezed States of Light in All Fiber Form-Factor

H Liu, ML Iu, N Hamdash, AS Helmy - arxiv preprint arxiv:2406.19991, 2024 - arxiv.org
Squeezed light sources, featuring significant degrees of squeezing, flexible time-frequency
attributes, and a compact salable form factor, serve as crucial building blocks in an …

Remote Preparation of Bright Squeezed Light via Field-Deployed Multi-Core Fibers

J Wang, J Liao, Z Chen, X Guo, Z Li… - Journal of Lightwave …, 2024 - ieeexplore.ieee.org
We developed a novel scheme for remote preparation of bright squeezed light using
standard fiber-based components over field-deployed multi-core fibers. By implementing two …

[HTML][HTML] Long-term stability of squeezed light in a fiber-based system using automated alignment

T Nakamura, T Nomura, M Endo… - Review of Scientific …, 2024 - pubs.aip.org
Providing a cloud service for optical quantum computing requires stabilizing the optical
system for extended periods. It is advantageous to construct a fiber-based system, which …