84 citations · 619 across the 35 of their papers we have counts for
5 papers · 1 filter
Optimal nonlocal conversion of photonic four-partite entanglement from two Bell pairs in quantum networks
Yuki Takeuchi, Nobuyuki Imoto, Toshiyuki Tashima
We analyze optimal schemes and also propose some practical schemes for the nonlocal conversion from two shared Bell pairs to four-qubit entangled states in optical quantum networks…
Merlin-Arthur with efficient quantum Merlin and quantum supremacy for the second level of the Fourier hierarchy
Tomoyuki Morimae, Yuki Takeuchi, Harumichi Nishimura
We introduce a simple sub-universal quantum computing model, which we call the Hadamard-classical circuit with one-qubit (HC1Q) model. It consists of a classical reversible circuit…
Verification of Many-Qubit States
Yuki Takeuchi, Tomoyuki Morimae
Verification is a task to check whether a given quantum state is close to an ideal state or not. In this paper, we show that a variety of many-qubit quantum states can be verified…
Information-theoretic security proof of differential-phase-shift quantum key distribution protocol based on complementarity
Akihiro Mizutani, Toshihiko Sasaki, Go Kato +2
We show the information-theoretic security proof of the differential-phase-shift (DPS) quantum key distribution (QKD) protocol based on the complementarity approach [arXiv:0704.366…
Verified measurement-based quantum computing with hypergraph states
Tomoyuki Morimae, Yuki Takeuchi, Masahito Hayashi
Hypergraph states are generalizations of graph states where controlled- gates on edges are replaced with generalized controlled- gates on hyperedges. Hypergraph states have s…