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Sakagami, Y. (2024) Characterization of Nash Equilibria for Quantum Games in General Position, with Full SU(2) Strategy Space and Varying Entanglement. Quantum Information Processing, 23, Article No. 395.
https://doi.org/10.1007/s11128-024-04600-w

has been cited by the following article:

• TITLE: A Note on Special Nash Equilibria of Quantum Games

  AUTHORS: Yoshitaka Sakagami

  KEYWORDS: Special Nash Equilibrium, Degree of Entanglement, SU (2), Strong Isomorphism

  JOURNAL NAME: Journal of Quantum Information Science, Vol.15 No.3, September 25, 2025

  ABSTRACT: This note revisits Sakagami in [1] and studies whether quantum 2 × 2 games with full SU (2) strategy space admit Nash equilibria whose payoff curves do not intersect the classical (no entanglement) payoffs. By allowing duplicate payoffs in each player’s table, we construct an example that yields such “special” equilibria for any entanglement and describe a further equilibrium when there is no entanglement. We also relate the example to strong isomorphism results by Frackiewicz in [2].