56 citations · 276 across the 24 of their papers we have counts for
11 papers · 1 filter
Security of Quantum Conference Key Agreement with Two-Way Classical Communication
Shun Kawakami, Mori Watanabe, Takuya Ikuta +1
Quantum conference key agreement (QCKA) enables multiple users to establish a common secret key with information-theoretic security and is regarded as a key primitive for secure co…
High-Dimensional Quantum Photonics: Roadmap
Mehul Malik, Micheal Kues, Takuya Ikuta +30
The field of high-dimensional quantum photonics involves the use of multimode photonic degrees-of-freedom such as the spatial, temporal, or spectral structure of light to encode mu…
Ultra-high-rate detection of entangled photon pairs
Toshimori Honjo, Shigeyuki Miyajima, Shigehito Miki +5
The high-rate detection of entangled photons is essential for advancing photonic quantum information processing. Although several experimental demonstrations have been reported, th…
Model-based framework for automated quantification of error sources in quantum state tomography
Junpei Oba, Hsin-Pin Lo, Yasuhiro Yamada +6
High-quality quantum state generation is essential for advanced quantum information processing, including quantum communication, quantum sensing, and quantum computing. In practice…
Generation of a time-bin Greenberger--Horne--Zeilinger state with an optical switch
Hsin-Pin Lo, Takuya Ikuta, Koji Azuma +3
Multipartite entanglement is a critical resource in quantum information processing that exhibits much richer phenomenon and stronger correlations than in bipartite systems. This ad…
Scalable implementation of mutually unbiased bases for -dimensional quantum key distribution
Takuya Ikuta, Seiseki Akibue, Yuya Yonezu +3
A high-dimensional quantum key distribution (QKD) can improve error rate tolerance and the secret key rate. Many -dimensional QKDs have used two mutually unbiased bases (MUBs),…
Entanglement generation using a controlled-phase gate for time-bin qubits
Hsin-Pin Lo, Takuya Ikuta, Nobuyuki Matsuda +2
Quantum logic gates are important for quantum computations and quantum information processing in numerous physical systems. While time-bin qubits are suited for quantum communicati…
Quantum process tomography of a controlled-phase gate for time-bin qubits
Hsin-Pin Lo, Takuya Ikuta, Nobuyuki Matsuda +3
Time-bin qubits, where information is encoded in a single photon at different times, have been widely used in optical fiber and waveguide based quantum communications. With the rec…
Four-dimensional entanglement distribution over 100 km
Takuya Ikuta, Hiroki Takesue
High-dimensional quantum entanglement can enrich the functionality of quantum information processing. For example, it can enhance the channel capacity for linear optic superdense c…
Implementation of quantum state tomography for time-bin qudits
Takuya Ikuta, Hiroki Takesue
Quantum state tomography (QST) is an essential tool for characterizing an unknown quantum state. Recently, QST has been performed for entangled qudits based on orbital angular mome…
Enhanced violation of the Collins-Gisin-Linden-Massar-Popescu inequality with optimized time-bin-entangled ququarts
Takuya Ikuta, Hiroki Takesue
High-dimensional quantum entanglement is drawing attention because it enables us to perform quantum information tasks that are robust against noises. To test the nonlocality of ent…