Nobuaki Obata. Quantum probability approach to spectral analysis of growing graphs. Groups and Graphs, Designs and Dynamics (R. A. Bailey, Peter J. Cameron and Yaokun Wu, Eds.). 2024. 87-175
Edy Tri Baskoro, Nobuaki Obata. A classification of graphs through quadratic embedding constants and clique graph insights. Communications in Combinatorics and Optimization. 2024
Nobuaki Obata. Complete multipartite graphs of non-QE class. Electronic Journal of Graph Theory and Applications. 2023. 11. 2. 511-527
Nobuaki OBATA. Primary Non-QE Graphs on Six Vertices. Interdisciplinary Information Sciences. 2023. 29. 2. 141-156
Zhenzhen Lou, Nobuaki Obata, Qiongxiang Huang. Quadratic Embedding Constants of Graph Joins. Graphs and Combinatorics. 2022. 38. 5
尾畑 伸明. On Overcompleteness of Coherent Vectors (Analytical Study of Quantum Information and Related Fields). 数理解析研究所講究録. 2001. 1196. 63-77
OBATA NOBUAKI. Quantum Stochastic Process as Continuous Flow of Fock Space Operators. 数理解析研究所講究録. 1997. 982. 196-208
OBATA NOBUAKI. Wick Product of White Noise Operators and Its Application to Quantum Stochastic Differential Equations(Quantum Stochastic Analysis and Related Fields). 数理解析研究所講究録. 1996. 957. 167-185
ACCARDI LUIGI, LU YUN-GANG, OBATA NOBUAKI. Towards a Non-linear Extension of Stochastic Calculus(Quantum Stochastic Analysis and Related Fields). 数理解析研究所講究録. 1996. 957. 1-15
OBATA NOBUAKI. CONDITIONAL EXPECTATION IN CLASSICAL AND QUANTUM WHITE NOISE CALCULI(Analysis of Operators on Gaussian Space and Quantum Probability Theory). 数理解析研究所講究録. 1995. 923. 154-190
A quantitative approach to quadratic embedding constants of graphs
(The 7th Tunisian-Japanese Conference: Geometric and Harmonic Analysis on Homogeneous Spaces and Applications)
On quadratic embedding constants of graphs
(The 25th Indonesia-Japan Conference on Discrete and Computational Geometry, Graphs and Games (IJCDCG3 2023))
Positivity of Q-matrices and quadratic embedding constants of graphs
(10th International Congress on Industrial and Applied Mathematics (ICIAM2023))
Quadratic embedding of graphs and positivity of their Q-matrices
(Workshop on Quantum Probability and Infinite Dimensional Analysis in honor of Professor Hui-Hsiung Kuo 2023)
Positive definite Q-matrices and primary non-QE graphs
(19th Workshop: Noncommutative Probability, Noncommutative Harmonic Analysis and Related Topics, with Applications 2022)