Publications (46)
Heralded single photon source at 1550 nm from pulsed parametric down conversion
Alexandre Soujaeff, Shigeki Takeuchi, Keiji Sasaki +2
Violation of local uncertainty relations as a signature of entanglement
Holger F. Hofmann, Shigeki Takeuchi
Optimized phase switching using a single atom nonlinearity
Holger F. Hofmann, Kunihiro Kojima, Shigeki Takeuchi +1
Anomaly detection in reconstructed quantum states using a machine-learning technique
Satoshi Hara, Takafumi Ono, Ryo Okamoto +2
Realization of quantum operations on photonic qubits by linear optics and post-selection
Holger F. Hofmann, Shigeki Takeuchi
Quantum-state tomography for spin-l systems
Holger F. Hofmann, Shigeki Takeuchi
Distinguishing genuine entangled two-photon-polarization states from independently generated pairs of entangled photons
Kenji Tsujino, Holger F. Hofmann, Shigeki Takeuchi +1
0.54 μm resolution two-photon interference with dispersion cancellation for quantum optical coherence tomography
Masayuki Okano, Hwan Hong Lim, Ryo Okamoto +3
Optical transmittance degradation in tapered fibers
Masazumi Fujiwara, Kiyota Toubaru, Shigeki Takeuchi
A study on the shape of two-photon wavefunctions after the nonlinear interaction with a one-dimensional atom
Kunihiro Kojima, Holger F. Hofmann, Shigeki Takeuchi +1
A high-yield single photon source using gated spontaneous parametric down conversion
Shigeki Takeuchi, Ryo Okamoto, Keiji Sasaki
Ultrathin fiber-taper coupling with nitrogen vacancy centers in nanodiamonds at cryogenic temperatures
Masazumi Fujiwara, Hong-Quan Zhao, Tetsuya Noda +3
Quantum filter for non-local polarization properties of photonic qubits
Holger F. Hofmann, Shigeki Takeuchi
Beating the standard quantum limit: Phase super-sensitivity of N-photon interferometers
Ryo Okamoto, Holger F. Hofmann, Tomohisa Nagata +3
An Entanglement Filter
Ryo Okamoto, Jeremy L. O'Brien, Holger F. Hofmann +3
Demonstration of an optical quantum controlled-NOT gate without path interference
Ryo Okamoto, Holger F. Hofmann, Shigeki Takeuchi +1
An Entanglement-Enhanced Microscope
Takafumi Ono, Ryo Okamoto, Shigeki Takeuchi
Nonlinear interaction of two photons at a one-dimensional atom: spatiotemporal quantum coherence in the emitted field
Kunihiro Kojima, Holger F. Hofmann, Shigeki Takeuchi +1
Generation of broadband spontaneous parametric fluorescence using multiple bulk nonlinear crystals
Masayuki Okano, Ryo Okamoto, Akira Tanaka +2
Coupling of ultrathin tapered fibers with high-Q microsphere resonators at cryogenic temperatures and observation of phase-shift transition from undercoupling to overcoupling
Masazumi Fujiwara, Tetsuya Noda, Akira Tanaka +3
Serial-parallel conversion for single photons with heralding signals
Takayuki Kiyohara, Ryo Okamoto, Shigeki Takeuchi
Implementation of a quantum controlled-SWAP gate with photonic circuits
Takafumi Ono, Ryo Okamoto, Masato Tanida +2
Non-linear excitation of quantum emitters in two-dimensional hexagonal boron nitride
Andreas W. Schell, Toan Trong Tran, Hideaki Takashima +2
Highly Efficient Coupling of Nanolight Emitters to a Ultra-wide Tunable Nanofibre Cavity
Andreas W. Schell, Hideaki Takashima, Shunya Kamioka +4
Dispersion cancellation in high resolution two-photon interference
Masayuki Okano, Ryo Okamoto, Akira Tanaka +3
Nonlocal Position Changes of a Photon Revealed by Quantum Routers
Avshalom C. Elitzur, Eliahu Cohen, Ryo Okamoto +1
Realization of a Knill-Laflamme-Milburn C-NOT gate -a photonic quantum circuit combining effective optical nonlinearities
Ryo Okamoto, Jeremy L. O'Brien, Holger F. Hofmann +1
Quantum phase gate for photonic qubits using only beam splitters and post-selection
Holger F. Hofmann, Shigeki Takeuchi
Realization of a resonant non-linear phase flip in cavity quantum electrodynamics
Holger F. Hofmann, Kunihiro Kojima, Shigeki Takeuchi +1
Efficiencies for the single mode operation of a quantum optical nonlinear shift gate
Kunihiro Kojima, Holger F. Hofmann, Shigeki Takeuchi +1
Exact minimum and maximum of yield with a finite number of decoy light intensities
Toyohiro Tsurumaru, Alexandre Soujaeff, Shigeki Takeuchi
Characterization of entanglement using sum uncertainty relations for N-level systems
Holger F. Hofmann, Shigeki Takeuchi
Phase shift spectra of a fiber-microsphere system at the single photon level
Akira Tanaka, Takeshi Asai, Kiyota Toubaru +4
Coupling quantum emitters in 2D materials with tapered fibers
Andreas W. Schell, Hideaki Takashima, Toan Trong Tran +2
Noncollinear parametric fluorescence by chirped quasi-phase matching for monocycle temporal entanglement
Akira Tanaka, Ryo Okamoto, Hwan Hong Lim +9
Analysis of an experimental quantum logic gate by complementary classical operations
Holger F. Hofmann, Ryo Okamoto, Shigeki Takeuchi
Highly efficient coupling of photons from nanoemitters into single-mode optical fibers
Masazumi Fujiwara, Kiyota Toubaru, Tetsuya Noda +2
Beating the Standard Quantum Limit with Four Entangled Photons
Tomohisa Nagata, Ryo Okamoto, Jeremy L. O'Brien +2
A simple scheme for expanding photonic cluster states for quantum information
Pruet Kalasuwan, Gabriel Mendoza, Anthony Laing +6
Experimental Demonstration of Adaptive Quantum State Estimation
Ryo Okamoto, Minako Iefuji, Satoshi Oyama +4
Characterization of a noisy quantum process by complementary classical operations
Holger F. Hofmann, Ryo Okamoto, Shigeki Takeuchi
Determining the optical axes of entangled Laguerre Gauss modes
Daisuke Kawase, Shigeki Takeuchi, Keiji Sasaki +3
Effects of noisy entangled state transmission on quantum teleportation
Holger F. Hofmann, Kenji Tsujino, Shigeki Takeuchi
Consistent Nonparametric Different-Feature Selection via the Sparsest $k$-Subgraph Problem
Satoshi Hara, Takayuki Katsuki, Hiroki Yanagisawa +4
Locally observable conditions for the successful implementation of entangling multi-qubit quantum gates
Holger F. Hofmann, Ryo Okamoto, Shigeki Takeuchi
Entanglement and four wave mixing effects in the dissipation free nonlinear interaction of two photons at a single atom
Holger F. Hofmann, Kunihiro Kojima, Shigeki Takeuchi +1