Publications in 2020
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Observation of binary phase states of time-multiplexed degenerate optical parametric oscillator pulses generated using a nonlinear fiber Sagnac loop
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Simulating Ising Spins in External Magnetic Fields with a Network of Degenerate Optical Parametric Oscillators
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Quantum Process Tomography of a Controlled-Phase Gate for Time-Bin Qubits
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Large-scale Coherent Ising Machine
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Experimental investigation of performance differences between coherent Ising machines and a quantum annealer
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Quantum information science and technology in Japan
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Experimental determination of Bose-Hubbard energies
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Completely scrambled memory for quantum superposition
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Experimental time-reversed adaptive Bell measurement towards all-photonic quantum repeaters
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Understanding dynamics of coherent Ising machines through simulation of large-scale 2D Ising models
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Entanglement generation using a controlled-phase gate for time-bin qubits
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Simulating the vibrational quantum dynamics of molecules using photonics
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Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
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Wideband slow short-pulse propagation in one-thousand slantingly coupled L3 photonic crystal nanocavities
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CFour-dimensional entanglement distribution over 100 km
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Boltzmann sampling for an XY model using a non-degenerate optical parametric oscillator network
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Coherent Ising machines-optical neural networks operating at the quantum limit
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Generation of entangled photons using an arrayed waveguide grating
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Precise tuning of single-photon frequency using an optical single sideband modulator
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Security enhanced memory for quantum state
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Octave-spanning supercontinuum generation at telecommunications wavelengths in a precisely dispersion- and length-controlled silicon-wire waveguide with a double taper structure
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Experimental demonstration of quantum digital signatures over 43 dB channel loss using differential phase shift quantum key distribution
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Optical nonlinearity enhancement with graphene-decorated silicon waveguides
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Implementation of quantum state tomography for time-bin qudits
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Heralded single excitation of atomic ensemble via solid-state-based telecom photon detection
Optica 3 (11), 1279-1284 (2016).
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A coherent Ising machine for 2000-node optimization problems
Science 354 (6312), 603-606 (2016).
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A fully programmable 100-spin coherent Ising machine with all-to-all connections
Science 354 (6312), 614-617 (2016).
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Experimental transmission of quantum digital signatures over 90 km of installed optical fiber using a differential phase shift quantum key distribution system
Opt. Lett. 41 (21), 4883-4886 (2016).
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Topological defect formation in 1D and 2D spin chains realized by network of optical parametric oscillators
Int. J. Mod. Phys. B 30 (25), 1630014 (2016).
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10 GHz clock time-multiplexed degenerate optical parametric oscillators for a photonic Ising spin network
Opt. Lett. 41 (18), 4273-4276 (2016).
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Quantum Adiabatic Pumping by Modulating Tunnel Phase in Quantum Dots
J. Phys. Soc. Jpn. 85 (8), 084704 (2016).
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Generation and manipulation of entangled photons on silicon chips
Nanophotonics 5 (3), 440-455 (2016).
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Spin-1 quantum walks
Phys. Rev. A 93 (6), 063625 (2016).
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Large-scale Ising spin network based on degenerate optical parametric oscillators
Nat. Photonics 10 (6), 415-+ (2016).
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Theoretical analysis of the spectroscopy of atomic Bose-Hubbard systems
Phys. Rev. A 93 (4), 043608 (2016).
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Wideband MgB2 Hot-Electron Bolometer Mixers: IF Impedance Characterisation and Modeling
IEEE Trans. Appl. Supercond. 26 (3), 2300105 (2016).
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Laser spectroscopic probing of coexisting superfluid and insulating states of an atomic Bose-Hubbard system
Nat. Commun. 7 11341 (2016).
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Determination of intrinsic lifetime of edge magnetoplasmons
Phys. Rev. B 93 (12), 125402 (2016).
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Effect of the Critical and Operational Temperatures on the Sensitivity of MgB2 HEB Mixers
IEEE Trans. Terahertz Sci. Technol. 6 (2), 238-244 (2016).
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Coherent Raman beat analysis of the hyperfine sublevel coherence properties of 167Er3+ ions doped in an Y2SiO5 crystal
J. Lumines. 171 183-190 (2016).
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Enhanced violation of the Collins-Gisin-Linden-Massar-Popescu inequality with optimized time-bin-entangled ququarts
Phys. Rev. A 93 (2), 022307 (2016).
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Dynamical instability in the S=1 Bose-Hubbard model
Phys. Rev. A 93 (1), 013628 (2016).
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Deterministic reshaping of single-photon spectra using cross-phase modulation
Sci. Adv. 2 (3), e1501223 (2016).
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Ultrafast coherent control of spinor Bose-Einstein condensates using stimulated Raman adiabatic passage
Phys. Rev. A 94 (5), 053636 (2016).
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Identifying a correlated spin fluctuation in an entangled spin chain subject to a quantum phase transition
Phys. Rev. E 92, 062143 (2015).
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An entanglement analogue in light cones
Prog. Theor. Exp. Phys. 123A04 (2015).
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Experimental quantum key distribution without monitoring signal disturbance
Nat. Photonics 9, 827-831 (2015).
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Quantum teleportation over 100 km of fiber using highly efficient superconducting nanowire single-photon detectors
Optica 2, 832-835 (2015).
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Universal linear optics
Science 349, 711-716 (2015).
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Ultimate low system dark-count rate for superconducting nanowire single-photon detector
Opt. Lett. 40, 3428-3431 (2015).
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Magnetism in the three-dimensional layered Lieb lattice: Enhanced transition temperature via flat-band and Van Hove singularities
Phys. Rev. A 91, 063610 (2015).
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Biomolecular ion detection using high-temperature superconducting MgB2 strips
Appl. Phys. Lett. 106, 222601 (2015).
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Introduction to the Issue on Quantum Communication and Cryptography
IEEE J. Sel. Top. Quantum Electron. 21, 0200402 (2015).
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Macroscopic quantum information processing using spin coherent states
Opt. Commun. 337 102-109 (2015).
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Coherent all-optical control of ultracold atoms arrays in permanent magnetic traps
Opt. Express 22 (3), 3501-3513 (2014).
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Density Modulations Associated with the Dynamical Instability in the Bose-Hubbard Model
J. Phys. Soc. Jpn. 83 (12), 124001 (2014).
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Macroscopic quantum information processing using spin coherent states
Optics Communicatins, 337, 102-109 (2014).
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Bose-Einstein condensate on a persistent-supercurrent atom chip
Appl. Phys. B-Lasers Opt. 116 (4), 821-829 (2014).
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High-Fidelity Cluster State Generation for Ultracold Atoms in an Optical Lattice
Phys. Rev. Lett. 112 (11), 110501 (2014).
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On-chip generation and demultiplexing of quantum correlated photons using a silicon-silica monolithic photonic integration platform
Opt. Express 22 (19), 22831-22840 (2014).
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Dispersion and light transport characteristics of large-scale photonic-crystal coupled nanocavity arrays
Opt. Lett. 39 (8), 2290-2293 (2014).
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Flat-band ferromagnetism in the multilayer Lieb optical lattice
Phys. Rev. A 90 (4), 043624 (2014).
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Fabrication of a MgB2 nanowire single-photon detector using Br2-N2 dry etching
Appl. Phys. Express 7 (10), 103101 (2014).
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Quantum key distribution over a 72 dB channel loss using ultralow dark count superconducting single-photon detectors
Opt. Lett. 39 (17), 5078-5081 (2014).
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Performance of Long-Distance Quantum Key Distribution Over 90-km Optical Links Installed in a Field Environment of Tokyo Metropolitan Area
J. Lightwave Technol. 32 (1), 141-151 (2014).
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Entangling time-bin qubits with a switch
Phys. Rev. A 89 (6), 062328 (2014).
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Entangled photons from on-chip slow light
Sci Rep 4, 3913 (2014).
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f-band condensates in exciton-polariton lattice systems
Phys. Rev. B 89 (8), 085306 (2014).
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Study of IF Bandwidth of MgB Phonon-Cooled Hot-Electron Bolometer Mixers
IEEE Trans. Terahertz Sci. Technol. 3 (4), 409-415 (2013).
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Quantum error correction for beginners
Rep. Prog. Phys. 76 (7), 076001 (2013).
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Requirements for fault-tolerant factoring on an atom-optics quantum computer
Nat. Commun. 4, 2524 (2013).
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Characteristics of superconducting single photon detector in DPS-QKD system under bright illumination blinding attack
Opt. Express 21 (5), 6304-6312 (2013).
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Excitation spectroscopy of few-electron states in artificial diatomic molecules
Phys. Rev. B 87 (24), 241414 (2013).
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Countermeasure against tailored bright illumination attack for DPS-QKD
Opt. Express 21 (3), 2667-2673 (2013).
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Fundamental limit to qubit control with coherent field
Phys. Rev. A 87 (2), 022321 (2013).
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SUPERFLUID, STAGGERED STATE, AND MOTT INSULATOR OF REPULSIVELY INTERACTING THREE-COMPONENT FERMIONIC ATOMS IN OPTICAL LATTICES
Mod. Phys. Lett. B 27 (12), 1330008 (2013).
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Polarization independent varifocal lens using KTN crystals
Opt. Lett. 38 (15), 2673-2675 (2013).
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Entanglement distribution over 300 km of fiber
Opt. Express 21 (20), 23241-23249 (2013).
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Backaction dephasing by a quantum dot detector
Phys. Rev. B 88 (15), 155402 (2013).
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Slow light enhanced correlated photon pair generation in photonic-crystal coupled-resonator optical waveguides
Opt. Express 21 (7), 8596-8604 (2013).
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Multipartite Nonlocality in Ontological Models of Quantum Theory
J. Phys. Soc. Jpn. 82 (5), 055003 (2013).
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Ultrathin MgB2 films fabricated by molecular beam epitaxy and rapid annealing
Supercond. Sci. Technol. 26 (3), 035005 (2013).
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Fabrication of MgB2 Nanowire Single-Photon Detector with Meander Structure
Appl. Phys. Express 6 (2), 023101 (2013).
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Superconducting Nanowire Single-Photon Detector with Ultralow Dark Count Rate Using Cold Optical Filters
Appl. Phys. Express 6 (7), 072801 (2013).
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Hybrid-system approach to fault-tolerant quantum communication
Phys. Rev. A 87 (5), 052333 (2013).
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High-threshold topological quantum error correction against biased noise
Phys. Rev. A 88 (6), 060301 (2013).
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An on-chip coupled resonator optical waveguide single-photon buffer
Nat. Commun. 4, 2725 (2013).
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Strongly interacting array of Bose-Einstein condensates trapped in a one-dimensional optical lattice
Phys. Rev. A 87 (4), 041604 (2013).
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Towards Realizing a Quantum Memory for a Superconducting Qubit: Storage and Retrieval of Quantum States
Phys. Rev. Lett. 111 (10), 107008 (2013).
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Partial decoherence in mesoscopic systems
Phys. Scr. T151, 014018 (2012).
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Photon-phonon entanglement in coupled optomechanical arrays
Phys. Rev. A 86 (4), 042306 (2012).
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Optimal entanglement manipulation via coherent-state transmission
Phys. Rev. A 85 (6), 060303 (2012).
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Quantum repeaters and computation by a single module: Remote nondestructive parity measurement
Phys. Rev. A 85 (6), 062309 (2012).
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Low noise MgB2 terahertz hot-electron bolometer mixers
Appl. Phys. Lett. 100 (3), 033504 (2012).
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Layer-by-layer generation of cluster states
Phys. Rev. A 85 (5), 052305 (2012).
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Overcoming decoherence in the collapse and revival of spin Schrodinger-cat states
Phys. Rev. A 85 (2), 022113 (2012).
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Superfluid State of Repulsively Interacting Three-Component Fermionic Atoms in Optical Lattices
Phys. Rev. Lett. 108 (25), 255301 (2012).
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Quantum metrology for nonlinear phase shifts with entangled coherent states
Phys. Rev. A 86 (4), 043828 (2012).
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Spin-orbit induced electronic spin separation in semiconductor nanostructures
Nat. Commun. 3, 1082 (2012).
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Exciton-polariton condensates with flat bands in a two-dimensional kagome lattice
New J. Phys. 14, 065002 (2012).
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A monolithically integrated polarization entangled photon pair source on a silicon chip
Sci Rep 2, 817 (2012).
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Quantum communication without the necessity of quantum memories
Nat. Photonics 6 (11), 777-781 (2012).
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The photon-assisted dynamic nuclear polarization effect in a double quantum dot
New J. Phys. 14, 123013 (2012).
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Entangled Photon Pair Generation Using Silicon Wire Waveguides
IEEE J. Sel. Top. Quantum Electron. 18 (6), 1722-1732 (2012).
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Phase encoding schemes for measurement-device-independent quantum key distribution with basis-dependent flaw
Phys. Rev. A 85 (4), 042307 (2012).
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Mott Transition and Spin Structures of Spin-1 Bosons in Two-Dimensional Optical Lattice at Unit Filling
J. Phys. Soc. Jpn. 81 (6), 063001 (2012).
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NbN superconducting single-photon with bilayer structure
Physics Procedia 36, 324-329 (2012).