580 citations · 3k across the 56 of their papers we have counts for
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Experimental implementation of continuous-variable QAOA on a quad-rail lattice cluster state
Shota Yokoyama, Atsushi Sakaguchi, Jun-ichi Yoshikawa +6
We experimentally demonstrate the continuous-variable quantum approximate optimization algorithm (CV-QAOA) for multi-variable problems and multiple QAOA depths using a measurement-…
Configuration design of multimode Gaussian operations on continuous-variable quad-rail lattice cluster states
Jun-ichi Yoshikawa, Warit Asavanant, Hironari Nagayoshi +4
Continuous-variable quad-rail lattice cluster states enable flexible quantum circuit design on their two-dimensional structure. However, how to combine basic operations on the quad…
A full-stack analog optical quantum computing platform with one hundred inputs
Shota Yokoyama, Atsushi Sakaguchi, Warit Asavanant +11
Optical technology is a highly promising platform for quantum computing due to its enormous potential for large-scale, ultrafast computation. However, realizing a programmable and…
Scalable Optical Quantum State Synthesizer with Dual-Mode Resonator Memory
Fumiya Hanamura, Kan Takase, Kazuki Hirota +12
Optical quantum computing is a promising approach for achieving large-scale quantum computation. While Gaussian operations have been successfully scaled, the inherently weak nonlin…
ZX Graphical Calculus for Continuous-Variable Quantum Processes
Hironari Nagayoshi, Warit Asavanant, Ryuhoh Ide +5
Continuous-variable (CV) quantum information processing is a promising candidate for large-scale fault-tolerant quantum computation. However, analysis of CV quantum process relies…
24-hour measurement of squeezed light using automated stable fiber system
Tomohiro Nakamura, Takefumi Nomura, Mamoru Endo +8
In order to provide a cloud service of optical quantum computing, it is inevitable to stabilize the optical system for many hours. It is advantageous to construct a fiber-based sys…
Low-loss polarization control in fiber systems for quantum computation
Tomohiro Nakamura, Takefumi Nomura, Mamoru Endo +5
Optical quantum information processing exploits interference of quantum light. However, when the interferometer is composed of optical fibers, degradation of interference visibilit…
Gaussian breeding for encoding a qubit in propagating light
Kan Takase, Kosuke Fukui, Akito Kawasaki +5
Practical quantum computing requires robust encoding of logical qubits in physical systems to protect fragile quantum information. Currently, the lack of scalability limits the log…
Non-Gaussian state generation with time-gated photon detection
Tatsuki Sonoyama, Kazuma Takahashi, Baramee Charoensombutamon +9
Non-Gaussian states of light, which are essential in fault-tolerant and universal optical quantum computation, are typically generated by a heralding scheme using photon detectors.…
Nonlinear feedforward enabling quantum computation
Atsushi Sakaguchi, Shunya Konno, Fumiya Hanamura +9
Measurement-based quantum computation with optical time-domain multiplexing is a promising method to realize a quantum computer from the viewpoint of scalability. Fault tolerance a…
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 Highly Pure Single-Photon State at Telecommunication Wavelength
Akito Kawasaki, Kan Takase, Takefumi Nomura +8
Telecommunication wavelength with well-developed optical communication technologies and low losses in the waveguide are advantageous for quantum applications. However, an experimen…
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…
Analysis of optical quantum state preparation using photon detectors in the finite-temporal-resolution regime
Tatsuki Sonoyama, Warit Asavanant, Kosuke Fukui +3
Quantum state preparation is important for quantum information processing. In particular, in optical quantum computing with continuous variables, non-Gaussian states are needed for…
Generating Gottesman-Kitaev-Preskill qubit using a cross-Kerr interaction between a squeezed light and Fock states in optics
Kosuke Fukui, Mamoru Endo, Warit Asavanant +3
Gottesman-Kitaev-Preskill (GKP) qubit is a promising ingredient for fault-tolerant quantum computation (FTQC) in optical continuous variables due to its advantage of noise toleranc…
Efficient backcasting search for optical quantum state synthesis
Kosuke Fukui, Shuntaro Takeda, Mamoru Endo +4
Non-Gaussian states are essential for many optical quantum technologies. The so-called optical quantum state synthesizer (OQSS), consisting of Gaussian input states, linear optics,…
Non-Clifford gate on optical qubits by nonlinear feedforward
Shunya Konno, Warit Asavanant, Kosuke Fukui +6
In a continuous-variable optical system, the Gottesman-Kitaev-Preskill (GKP) qubit is a promising candidate for fault-tolerant quantum computation. To implement non-Clifford operat…
Wave-function engineering via conditional quantum teleportation with non-Gaussian entanglement resource
Warit Asavanant, Kan Takase, Kosuke Fukui +3
We propose and analyze a setup to tailor the wave functions of the quantum states. Our setup is based on the quantum teleportation circuit, but instead of the usual two-mode squeez…
Nonlinear squeezing for measurement-based non-Gaussian operations in time domain
Shunya Konno, Atsushi Sakaguchi, Warit Asavanant +6
Quantum non-Gaussian gate is a missing piece to the realization of continuous-variable universal quantum operations in the optical system. In a measurement-based implementation of…
Generation of optical Schrödinger's cat states by generalized photon subtraction
Kan Takase, Jun-ichi Yoshikawa, Warit Asavanant +2
We propose a high-rate generation method of optical Schrödinger's cat states. Thus far, photon subtraction from squeezed vacuum states has been a standard method in cat-state gener…
Phase Locking between Two All-Optical Quantum Memories
Fumiya Okamoto, Mamoru Endo, Mikihisa Matsuyama +7
Optical approaches to quantum computation require the creation of multi-mode photonic quantum states in a controlled fashion. Here we experimentally demonstrate phase locking of tw…
One-hundred step measurement-based quantum computation multiplexed in the time domain with 25 MHz clock frequency
Warit Asavanant, Baramee Charoensombutamon, Shota Yokoyama +8
Among various approaches toward quantum computation, measurement-based quantum computation (MBQC) multiplexed in time domain is currently a promising method for addressing the need…
Time-Domain Multiplexed 2-Dimensional Cluster State: Universal Quantum Computing Platform
Warit Asavanant, Yu Shiozawa, Shota Yokoyama +8
Quantum computation promises applications that are thought to be impossible with classical computation. To realize practical quantum computation, the following three properties wil…
Complete temporal mode characterization of non-Gaussian states by dual homodyne measurement
Kan Takase, Masanori Okada, Takahiro Serikawa +3
Optical quantum states defined in temporal modes, especially non-Gaussian states like photon-number states, play an important role in quantum computing schemes. In general, the tem…