Effects of hydrogen-like impurity on the coherence time of asymmetric Gaussian confinement potential quantum well qubit

Abstract

Abstract We calculate the coherent time of a qubit formed between the ground state (GS) and the first excited state (FES) of strong-coupling polaron in an asymmetric Gaussian confinement potential quantum well (AGCPQW) with a hydrogen-like impurity at the coordinate origin. The coherent time changing with the strength of the Coulombic impurity potential (CIP), the AGCPQW's height, the range of the limited potential (RLP), the oscillating frequency of the AGCPQW and the radius of the polaron are presented. Our numerical results indicate that the coherent time of the qubit depends on the strength of the CIP, the height of the AGCPQW, the radius of the polaron and the RLP. These physical parameters are important for adjusting the coherence time to realize stable qubit.