2p-X-4 CuCl励起子および励起子分子による三光束非縮退反射型四光波混合の発生

真 桑田, 信方 長澤

信方 長沢, 直太郎 中田, 佳子 土井 +1 more

泰章 舛本, 繁雄 塩谷

Liqi Wang, Shixin Zhu

In this paper, based on the Steane's enlargement construction, three classes of non-binary quantum codes are constructed from classical repeated-root cyclic codes of length 2ps over 𝔽q with odd characteristic p. The exact minimum distances of these quantum codes are determined. This construction yields a quantum MDS code with parameters [[2p, 2p - 4, 3]]p and two good quantum codes with parameters [[2p, 2p - 7, 4]]p and [[2p, 2p - 10, 5]]p.

Hosaka Koichi, Yutaro Torizuka, Philipp Schmidt +4 more

In this paper, as a continuation of our recent article demonstrating that the 2p atom pair is entangled in the H2 photodissociation [Phys. Rev. A 111, 023116 (2025)], we have discovered the origins of the entanglement for the 2p atom-pair state and obtained the entanglement entropies by origins. The same investigation has been carried out for the precursor molecular state of the 2p atom pair. The reason for the increase of the entanglement entropy during the dissociation from the precursor molecule into the H(2p) + H(2p) atom pair has been made clear.

正 伊藤, 隆 上遠野, 正康 上田