Quantum computational advantage with a programmable photonic processor

LS Madsen, F Laudenbach, MF Askarani, F Rortais… - Nature, 2022 - nature.com
A quantum computer attains computational advantage when outperforming the best
classical computers running the best-known algorithms on well-defined tasks. No photonic …

Logical states for fault-tolerant quantum computation with propagating light

S Konno, W Asavanant, F Hanamura, H Nagayoshi… - Science, 2024 - science.org
To harness the potential of a quantum computer, quantum information must be protected
against error by encoding it into a logical state that is suitable for quantum error correction …

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 …

Information processing at the speed of light

M AbuGhanem - Frontiers of Optoelectronics, 2024 - Springer
In recent years, quantum computing has made significant strides, particularly in light-based
technology. The introduction of quantum photonic chips has ushered in an era marked by …

Scaling and networking a modular photonic quantum computer

H Aghaee Rad, T Ainsworth, RN Alexander, B Altieri… - Nature, 2025 - nature.com
Photonics offers a promising platform for quantum computing,,–, owing to the availability of
chip integration for mass-manufacturable modules, fibre optics for networking and room …

Nonlinear feedforward enabling quantum computation

A Sakaguchi, S Konno, F Hanamura… - Nature …, 2023 - nature.com
Measurement-based quantum computation with optical time-domain multiplexing is a
promising method to realize a quantum computer from the viewpoint of scalability. Fault …

[HTML][HTML] Over-8-dB squeezed light generation by a broadband waveguide optical parametric amplifier toward fault-tolerant ultra-fast quantum computers

T Kashiwazaki, T Yamashima, K Enbutsu… - Applied Physics …, 2023 - pubs.aip.org
We achieved continuous-wave 8.3-dB squeezed light generation using a terahertz-order-
broadband waveguide optical parametric amplifier by improving a measurement setup from …

Non-Gaussian quantum state generation by multi-photon subtraction at the telecommunication wavelength

M Endo, R He, T Sonoyama, K Takahashi… - Optics …, 2023 - opg.optica.org
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-tolerant …

Generation of flying logical qubits using generalized photon subtraction with adaptive Gaussian operations

K Takase, F Hanamura, H Nagayoshi, JE Bourassa… - Physical Review A, 2024 - APS
The generation of a logical qubit called the Gottesman-Kitaev-Preskill (GKP) qubit in an
optical traveling wave is a major challenge for realizing large-scale universal fault-tolerant …