Quantum cryptography-from single-photon transmission, key extraction methods to novel quantum information protocols. - Anders Karlsson; Mohamed Bourenanne; Daniel Ljunggren; Per Jonsson; Alexandru Hening; Juan Pena Ciscar; Masato Koashi; Nobuyuki Imoto (CEC, 1999)

Entanglement cost of generalised measurements. - Richard Jozsa; Masato Koashi; Noah Linden; Sandu Popescu; Stuart Presnell; Dan J. Shepherd; Andreas J. Winter 002 (Quantum Inf. Comput., 2003)

An Elementary Optical Gate for Expanding Symmetrically Shared Entanglement. - Toshiyuki Tashima; Sahin Kaya Özdemir; Takashi Yamamoto; Masato Koashi; Nobuyuki Imoto (TQC, 2008)

Security of Key Distribution and Complementarity in Quantum Mechanics. - Masato Koashi (ICITS, 2009)

Local Transformation of Two EPR Photon Pairs into a Three-Photon W State Using a Polarization Dependent Beamsplitter. - Toshiyuki Tashima; Tetsurho Wakatsuki; Sahin Kaya Özdemir; Takashi Yamamoto; Masato Koashi; Nobuyuki Imoto (QuantumComm, 2009)

Learning with Optimized Random Features: Exponential Speedup by Quantum Machine Learning without Sparsity and Low-Rank Assumptions. - Hayata Yamasaki; Sathyawageeswar Subramanian; Sho Sonoda; Masato Koashi (NeurIPS, 2020)

Fast Quantum Algorithm for Learning with Optimized Random Features. - Hayata Yamasaki; Sathyawageeswar Subramanian; Sho Sonoda; Masato Koashi (CoRR, 2020)

Black holes as clouded mirrors: the Hayden-Preskill protocol with symmetry. - Yoshifumi Nakata; Eyuri Wakakuwa; Masato Koashi (Quantum, 2023)

Refined finite-size analysis of binary-modulation continuous-variable quantum key distribution. - Takaya Matsuura; Shinichiro Yamano; Yui Kuramochi; Toshihiko Sasaki; Masato Koashi (Quantum, 2023)

Tight concentration inequalities for quantum adversarial setups exploiting permutation symmetry. - Takaya Matsuura; Shinichiro Yamano; Yui Kuramochi; Toshihiko Sasaki; Masato Koashi (Quantum, 2024)