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List of works by Masato Koashi

A photonic quantum interface for visible-to-telecommunication wavelength conversion

scientific article published in September 2012

A protocol of quantum key distribution without relying on information-disturbance trade off

Boosting up quantum key distribution by learning statistics of practical single-photon sources

Demonstration of Local Expansion Toward Large-Scale Entangled Webs

scientific article published in Physical Review Letters

Direct observation of Hardy's paradox by joint weak measurement with an entangled photon pair

Efficient Decoherence-Free Entanglement Distribution over Lossy Quantum Channels

scientific article published in Physical Review Letters

Efficient Quantum Pseudorandomness with Nearly Time-Independent Hamiltonian Dynamics ⬇️

article

Efficient Simulation of Quantum Error Correction Under Coherent Error Based on the Nonunitary Free-Fermionic Formalism

scientific article published on 9 November 2017

Efficient and robust photonic entanglement distribution using decoherence-free subspace

scientific article published in 2011

Elementary optical gate for expanding an entanglement web

Error exponents for entanglement concentration

article

Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light

scientific article published on 6 July 2017

Experimental extraction of an entangled photon pair from two identically decohered pairs

scientific article published in Nature

Extracting an entangled photon pair from collectively decohered pairs at a telecommunication wavelength ⬇️

scientific article published on 14 May 2015

Fidelity criterion for quantum-domain transmission and storage of coherent states beyond the unit-gain constraint ⬇️

scientific article published on 4 September 2008

Fidelity estimation and entanglement verification for experimentally produced four-qubit cluster states

Frequency down-conversion of 637 nm light to the telecommunication band for non-classical light emitted from NV centers in diamond

scientific article published in May 2014

Frequency-domain Hong–Ou–Mandel interference ⬇️

scientific article published on 18 April 2016

Generation of High-Fidelity Four-Photon Cluster State and Quantum-Domain Demonstration of One-Way Quantum Computing

scientific article published in Physical Review Letters

Generation of maximum spin entanglement induced by a cavity field in quantum-dot systems

Heralded single excitation of atomic ensemble via solid-state-based telecom photon detection

scientific article published on 31 October 2016

High visibility Hong-Ou-Mandel interference via a time-resolved coincidence measurement

scientific article published in May 2017

High-fidelity conversion of photonic quantum information to telecommunication wavelength with superconducting single-photon detectors

scientific article published on 2 January 2013

High-fidelity entanglement swapping and generation of three-qubit GHZ state using asynchronous telecom photon pair sources

scientific article published on 23 January 2018

High-fidelity frequency down-conversion of visible entangled photon pairs with superconducting single-photon detectors

scientific article published in 2014

Local Transformation of Two EPR Photon Pairs into a Three-Photon W State Using a Polarization Dependent Beamsplitter

Local Transformation of Two Einstein-Podolsky-Rosen Photon Pairs into a Three-Photon W State

scientific article published in Physical Review Letters

Local expansion of photonic W state using a polarization-dependent beamsplitter

Monogamy of quantum entanglement and other correlations

article

Non-classical interference between two telecom photons with wavelength conversion

scientific article published in June 2013

Nonclassical two-photon interference between independent telecommunication light pulses converted by difference-frequency generation

scientific article published on 14 October 2013

Nonlinear Phenomena in Quantum Optics

Observation of two output light pulses from a partial wavelength converter preserving phase of an input light at a single-photon level

scientific article published in November 2013

Optimal entanglement generation for efficient hybrid quantum repeaters

scientific article published on 15 December 2009

Optimal local expansion ofWstates using linear optics and Fock states

scientific article published on 24 January 2011

Optimal two-qubit tomography based on local and global measurements: Maximal robustness against errors as described by condition numbers ⬇️

article by Adam Miranowicz et al published 18 December 2014 in Physical Review A

Photon Number Squeezing Enhanced by Multi-Photon Absorption in Microcavity

Polarization-entangled W state using parametric down-conversion

Practical quantum key distribution protocol without monitoring signal disturbance

scientific article

Probabilistic manipulation of entangled photons

Process Characterization of Experimental Photonic One-Way Quantum Computing

Quantum key distribution with an efficient countermeasure against correlated intensity fluctuations in optical pulses

scientific article published on 9 February 2018

Realization of symmetric sharing of entanglement in semiconductor microcrystallites coupled by a cavity field

Robust photonic entanglement distribution by state-independent encoding onto decoherence-free subspace

Robustness of quantum communication based on a decoherence-free subspace using a counter-propagating weak coherent light pulse

Selective entanglement breaking ⬇️

Simple and efficient quantum key distribution with parametric down-conversion ⬇️

scientific article published on 2 November 2007

Simple experimental generation of a four-photon cluster state and distinguishing classes of genuine four-qubit entanglement using witness operators

Simple experimental scheme of preparing a four-photon entangled state for the teleportation-based realization of a linear optical controlled-NOT gate

Size-dependent decoherence of excitonic states in semiconductor microcrystallites

Unconditional security of coherent-state quantum key distribution with a strong phase-reference pulse

scientific article published on 15 September 2004

Universal gates for transforming multipartite entangled Dicke states

scientific article published on 4 February 2014

Wide-band quantum interface for visible-to-telecommunication wavelength conversion

scientific article published in Nature Communications

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