Cheng H.-CHsieh M.-H.HAO-CHUNG CHENG2021-09-022021-09-02201721578095https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034029434&doi=10.1109%2fISIT.2017.8006537&partnerID=40&md5=ca58719bb2da561ccd983c8bfce239eehttps://scholars.lib.ntu.edu.tw/handle/123456789/580530"To be considered for the 2017 IEEE Jack Keil Wolf ISIT Student Paper Award." We show that the reliable communication through a classical-quantum channel is possible when the transmission rate approaches the channel capacity sufficiently slowly. This scenario exists between the non-vanishing error probability regime, where the rate tends to capacity with a fixed error, and the small error probability regime, where the error vanishes given a rate below capacity. The proof employs a sharp concentration bound in strong large deviation theory, and the asymptotic expansions of the error-exponent functions. ? 2017 IEEE.Communication channels (information theory); Errors; Information theory; Quantum entanglement; Asymptotic expansion; Classical-quantum channels; Concentration bounds; Error probabilities; Large deviation theory; Moderate-deviations; Reliable communication; Transmission rates; Channel capacityconference paper10.1109/ISIT.2017.80065372-s2.0-85034029434