Some New Quantum Codes from Constacyclic BCH Codes

Let q≥ 3 be an odd prime power and m≥ 2 be an even integer. In this paper, a kind of narrow-sense constacyclic BCH codes over 𝔽_q^2 with lengths n=q^2m-1/2a(q+1) are studied, where q≡ a+1 2a and a