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 …

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 …

[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
ABSTRACT We achieved continuous-wave 8.3-dB squeezed light generation using a
terahertz-order-broadband waveguide optical parametric amplifier by improving a …

Enhanced entanglement and quantum teleportation of two-mode squeezed vacuum state via multistage non-Gaussian operations

TM Duc, TQ Dat - Optik, 2023 - Elsevier
The improvement of quantum features and processes, prominent as entanglement and
quantum teleportation, of the two-mode squeezed vacuum state (TMSVS) in the small …

The photonic content of a transmission-line pulse

E Varvelis, D Biswas… - Proceedings of the …, 2024 - National Acad Sciences
We develop a photonic description of short, one-dimensional electromagnetic pulses,
specifically in the language of electrical transmission lines. Current practice in quantum …

Gaussian breeding for encoding a qubit in propagating light

K Takase, K Fukui, A Kawasaki, W Asavanant… - arXiv preprint arXiv …, 2022 - arxiv.org
Practical quantum computing requires robust encoding of logical qubits in physical systems
to protect fragile quantum information. Currently, the lack of scalability limits the logical …

Scalable protocol to mitigate crosstalk in universal quantum gates

Y Liang, MJ Liang, S Li, ZD Wang, ZY Xue - Physical Review Applied, 2024 - APS
High-fidelity universal quantum gates are widely acknowledged as essential for scalable
quantum computation. However, in solid-state quantum systems, which hold promise as …

Sub-gigahertz bandwidth all-optical tunable differentiator with high-energy efficiency based on a micro-ring resonator

L Ye, Z Zhang, H Ma, H Yu, Y Wang, J Yang - Optics Letters, 2024 - opg.optica.org
We propose and demonstrate a tunable fractional-order photonic differentiator (DIFF) that
can process input pulses with a sub-gigahertz bandwidth. Our scheme utilizes the self …

Scalable Protocol for ZZ-Crosstalk Mitigation in Universal Quantum Gates

Y Liang, MJ Liang, S Li, ZD Wang, ZY Xue - arXiv preprint arXiv …, 2023 - arxiv.org
High-fidelity universal quantum gates are widely acknowledged as essential for scalable
quantum computation. However, in solid-state quantum systems, which hold promise as …

Optical waveform engineering of non-Gaussian states

K Takase, BK Jeong, T Kashiwazaki… - European Quantum …, 2023 - opg.optica.org
Toward the realization of quantum information processing (QIP), continuous-variable (CV)
system is a promising candidate, where scalable quantum information processors are …