Shigehito Miki
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View article: Scalable Optical Quantum State Synthesizer with Dual-Mode Resonator Memory
Scalable Optical Quantum State Synthesizer with Dual-Mode Resonator Memory Open
Optical quantum computing is a promising approach for achieving large-scale quantum computation. While Gaussian operations have been successfully scaled, the inherently weak nonlinearity in optics makes generating highly non-Gaussian state…
View article: Experimental entanglement swapping through single-photon χ(2) nonlinearity
Experimental entanglement swapping through single-photon χ(2) nonlinearity Open
In photonic quantum information processing, quantum operations using nonlinear photon-photon interactions are vital for implementing two-qubit gates and enabling faithful entanglement swapping. However, due to the weak interaction between …
View article: Hybrid biphoton spectrometer for time-resolved quantum spectroscopy across visible and near-infrared regions
Hybrid biphoton spectrometer for time-resolved quantum spectroscopy across visible and near-infrared regions Open
Joint spectral measurements are a powerful tool for characterising biphoton spectral correlation, which is crucial for quantum information and communication technologies. In these applications, highly pure biphoton states are essential in …
View article: Distribution of non-Gaussian states in a deployed telecommunication fiber channel
Distribution of non-Gaussian states in a deployed telecommunication fiber channel Open
Optical non-Gaussian states hold great promise as a pivotal resource for advanced optical quantum information processing and fault-tolerant long-distance quantum communication. Establishing their faithful transmission in a real-world commu…
View article: Low‐Loss Polarization‐Maintaining Router for Single and Entangled Photons at a Telecom Wavelength
Low‐Loss Polarization‐Maintaining Router for Single and Entangled Photons at a Telecom Wavelength Open
Photon polarization serves as an essential quantum information carrier in quantum information and measurement applications. Routing of arbitrarily polarized single photons and polarization‐entangled photons is a crucial technology for scal…
View article: Evaluating a Multi-Color Entangled-Photon Source for a Bosonic Silicon Quantum Circuit
Evaluating a Multi-Color Entangled-Photon Source for a Bosonic Silicon Quantum Circuit Open
We evaluated a multi-color two-photon entangled state generated in silicon via spontaneous four-wave mixing (SFWM) as a potential source for bosonic integrated circuits. Spatially entangled photon states were created using a pair of silico…
View article: Optically sampled superconducting-nanostrip photon-number resolving detector for non-classical quantum state generation
Optically sampled superconducting-nanostrip photon-number resolving detector for non-classical quantum state generation Open
Photon-number-resolving detectors (PNRDs) are the ultimate optical sensors. Superconducting-nanostrip photon detectors (SNSPDs), traditionally known as ON-OFF detectors, have recently been found to have photon number resolving capability w…
View article: Two-micron-wavelength single-photon detection using the high-critical-current-bank structure superconducting wide strip photon detector
Two-micron-wavelength single-photon detection using the high-critical-current-bank structure superconducting wide strip photon detector Open
Superconducting strip photon detector is a promising technology for achieving high detection efficiency around the 2000 nm wavelength region where exciting applications are expected in fields ranging from quantum science to atmospheric phy…
View article: Low-loss polarization-maintaining router for single and entangled photons at a telecom wavelength
Low-loss polarization-maintaining router for single and entangled photons at a telecom wavelength Open
Photon polarization serves as an essential quantum information carrier in quantum information and measurement applications. Routing of arbitrarily polarized single photons and polarization-entangled photons is a crucial technology for scal…
View article: Sequential and Programmable Squeezing Gates for Optical Non-Gaussian Input States
Sequential and Programmable Squeezing Gates for Optical Non-Gaussian Input States Open
Quantum computing has been pursued with various hardware platforms and an optical system is one of the most reasonable choices for large-scale computation. In the optical continuous-variable computation scheme, the incorporation of Gaussia…
View article: Experimental entanglement swapping through single-photon $χ^{(2)}$ nonlinearity
Experimental entanglement swapping through single-photon $χ^{(2)}$ nonlinearity Open
In photonic quantum information processing, quantum operations using nonlinear photon-photon interactions are vital for implementing two-qubit gates and enabling faithful entanglement swapping. However, due to the weak interaction between …
View article: Broadband generation and tomography of non-Gaussian states for ultra-fast optical quantum processors
Broadband generation and tomography of non-Gaussian states for ultra-fast optical quantum processors Open
Quantum information processors benefit from high clock frequencies to fully harness quantum advantages before they are lost to decoherence. All-optical systems offer unique benefits due to their inherent 100-THz carrier frequency, enabling…
View article: 1xN DWDM channel selective quantum frequency conversion
1xN DWDM channel selective quantum frequency conversion Open
Dense Wavelength Division Multiplexing (DWDM) is a key technology for realizing high-capacity and flexible quantum communication networks. In addition, to realize the emerging quantum internet, quantum frequency conversion is also essentia…
View article: Low-noise quantum frequency conversion with cavity enhancement of converted mode
Low-noise quantum frequency conversion with cavity enhancement of converted mode Open
Quantum frequency conversion (QFC) which converts the frequencies of photons while preserving the quantum state is an essential technology for realizing the quantum internet and quantum interconnect. For the QFC based on the frequency down…
View article: Generation of multi-photon Fock states at telecommunication wavelength using picosecond pulsed light
Generation of multi-photon Fock states at telecommunication wavelength using picosecond pulsed light Open
Multi-photon Fock states have diverse applications such as optical quantum information processing. For the implementation of quantum information processing, Fock states should be generated within the telecommunication wavelength band, part…
View article: Time-domain programmable beam-splitter operations for an optical phase-sensitive non-Gaussian state
Time-domain programmable beam-splitter operations for an optical phase-sensitive non-Gaussian state Open
We present a loop-based optical processor enabling time-domain programmable\nbeam-splitter (BS) operations for a phase-sensitive non-Gaussian state. The\nloop itself is of high quality, allowing for storage of a non-Gaussian state\nfor up …
View article: Optically-Sampled Superconducting-Nanostrip Photon-Number Resolving Detector for Non-Classical Quantum State Generation
Optically-Sampled Superconducting-Nanostrip Photon-Number Resolving Detector for Non-Classical Quantum State Generation Open
Photon number-resolving detectors (PNRDs) are the ultimate optical sensors. Superconducting-nanostrip photon detectors (SNSPDs), traditionally known as ON-OFF detectors, have recently been found to have photon number resolving capability w…
View article: Generation of multi-photon Fock states at telecommunication wavelength using picosecond pulsed light
Generation of multi-photon Fock states at telecommunication wavelength using picosecond pulsed light Open
Multi-photon Fock states have diverse applications such as optical quantum information processing. For the implementation of quantum information processing, it is desirable that Fock states be generated within the telecommunication wavelen…
View article: Boosting the generation rate of squeezed single-photon states by generalized photon subtraction
Boosting the generation rate of squeezed single-photon states by generalized photon subtraction Open
In optical quantum information processing with continuous variables, optical non-Gaussian quantum states are essential for universal and fault-tolerant quantum computation. Experimentally, their most typical generation method is photon sub…
View article: Cryogenic Signal Processing based on Single-Flux-Quantum Circuit for Advanced Superconducting Nanostrip Single-Photon Detector Systems
Cryogenic Signal Processing based on Single-Flux-Quantum Circuit for Advanced Superconducting Nanostrip Single-Photon Detector Systems Open
A single-flux-quantum circuit is a promising device for a cryogenic signal processor for a superconducting nanostrip single photon detector (SNSPD) due to its high-speed operation, low power dissipation, and low timing jitter. The cryogeni…
View article: Sequential and Programmable Squeezing Gates for Optical Non-Gaussian Input States
Sequential and Programmable Squeezing Gates for Optical Non-Gaussian Input States Open
Quantum computing has been pursued with various hardware platforms, and an optical system is one of the most reasonable choices for large-scale computation. In the optical continuous-variable computation scheme, the incorporation of Gaussi…
View article: High-rate Generation and State Tomography of Non-Gaussian Quantum States for Ultra-fast Clock Frequency Quantum Processors
High-rate Generation and State Tomography of Non-Gaussian Quantum States for Ultra-fast Clock Frequency Quantum Processors Open
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, all-optical systems offer unique advantages due to their in…
View article: New Trends for Superconducting Strip Photon Detector Technology
New Trends for Superconducting Strip Photon Detector Technology Open
Photon absorption in a superconducting strip with a thickness of only a few nanometers produces excited quasiparticles eventually produce a localized resistive region. A Superconducting Strip Photon Detector （SSPD） based on this phenomenon…
View article: Single-Shot Single-Mode Optical Two-Parameter Displacement Estimation beyond Classical Limit
Single-Shot Single-Mode Optical Two-Parameter Displacement Estimation beyond Classical Limit Open
Uncertainty principle prohibits the precise measurement of both components of displacement parameters in phase space. We have theoretically shown that this limit can be beaten using single-photon states, in a single-shot and single-mode se…
View article: Superconducting wide strip photon detector with high critical current bank structure
Superconducting wide strip photon detector with high critical current bank structure Open
The single-photon detector is an essential technology in photonic quantum information science and technology. Large-scale photonic quantum computers and quantum networks inevitably require numerous high-performance single-photon detectors.…
View article: Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator Open
A quantum computer with low-error, high-speed quantum operations and capability for interconnections is required for useful quantum computations. A logical qubit called Gottesman-Kitaev-Preskill (GKP) qubit in a single Bosonic harmonic osc…