252 citations · 3.4k across the 59 of their papers we have counts for
8 papers · 2 filters
Local transformation of two EPR photon pairs into a three-photon W state
Toshiyuki Tashima, Tetsuroh Wakatsuki, Sahin Kaya Ozdemir +3
We propose and experimentally demonstrate a transformation of two EPR photon pairs distributed among three parties into a three-photon W state using local operations and classical…
Optimal entanglement generation for efficient hybrid quantum repeaters
Naoya Sota, Koji Azuma, Ryo Namiki +4
We propose a realistic protocol to generate entanglement between quantum memories at neighboring nodes in hybrid quantum repeaters. Generated entanglement includes only one type of…
Direct observation of Hardy's paradox by joint weak measurement with an entangled photon pair
Kazuhiro Yokota, Takashi Yamamoto, Masato Koashi +1
We implemented a joint weak measurement of the trajectories of two photons in a photonic version of Hardy's experiment. The joint weak measurement has been performed via an entangl…
Local expansion of photonic W state using a polarization dependent beamsplitter
Toshiyuki Tashima, Sahin Kaya Ozdemir, Takashi Yamamoto +2
We propose a simple probabilistic optical gate to expand polarization entangled W states. The gate uses one polarization-dependent beamsplitter and a horizontally polarized single…
Robust photonic entanglement distribution via state-independent encoding onto decoherence-free subspace
Takashi Yamamoto, Kodai Hayashi, Sahin Kaya Ozdemir +2
Efficient and faithful implementation of quantum information tasks, e.g., quantum computing, quantum communication and quantum metrology, requires robust and state-independent deco…
Generation of high-fidelity four-photon cluster state and quantum-domain demonstration of one-way quantum computing
Yuuki Tokunaga, Shin Kuwashiro, Takashi Yamamoto +2
We experimentally demonstrate a simple scheme for generating a four-photon entangled cluster state with fidelity over 0.860 0.015. We show that the fidelity is high enough to…
Security of entanglement-based quantum key distribution with practical detectors
Masato Koashi, Yoritoshi Adachi, Takashi Yamamoto +1
We prove the unconditional security of an entanglement-based quantum-key-distribution protocol using detectors that respond to multiple modes of light and cannot distinguish betwee…
An elementary optical gate for expanding entanglement web
Toshiyuki Tashima, Sahin Kaya Ozdemir, Takashi Yamamoto +2
We introduce an elementary optical gate for expanding polarization entangled W states, in which every pair of photons are entangled alike. The gate is composed of a pair of 50:50 b…