A flat band system with interaction that possesses a single “quantum scar”, which we have proposed in Kuno-Mizoguchi-Hatsugai, Phys. Rev. B 102, 241115(R) (2020), is extended to a system with multiple quantum scars. Then quantum dynamics starting from some atypical state is dominated by these scars that might be possible to be observed in cold atom experiments. Have a look at “Multiple quantum scar states and emergent slow thermalization in a flat-band system”, by Yoshihito Kuno, Tomonari Mizoguchi, and Yasuhiro Hatsugai, Phys. Rev. B 104, 085130 – Published 16 August 2021. See also arXiv:2105.00926.