Abstract This paper establishes the noncommutative maximal inequality for discrete spherical averages over a lacunary sequence. Our main result extends the work of Hughes J. Anal. Math. 138 (2019), no. 1, 1‐21 to the noncommutative setting and, meanwhile, strengthens the recent study of Chen and Hong arXiv: 2410.06035 (2024) to the case of .
Li et al. (Tue,) studied this question.