Remote state preparation with bipartite entangled states in noisy environments
Hua-Qiu Liang, Liu Jin-Ming, (1)华东师范大学物理系精密光谱科学与技术国家重点实验室，上海 200062; (2)华东师范大学物理系精密光谱科学与技术国家重点实验室，上海 200062；台州学院物理与电子工程学院物理系，台州 318000 · Acta Physica Sinica · 2009
We investigate the influence of quantum noises on the processes of remote preparation of a qubit by using an Einstein-Podolsky-Rosen （EPR） state and a bipartite partially entangled state as the quantum channel respectively. By solving the master equation in the Lindblad form, we obtain the time evolution of the quantum channels. Then we use the trace distance to describe how close the output state and the initial state are in various noisy conditions. Our results show that the influence of the noise acting on z direction is the weakest, and the influence of the noises acting simultaneously on x, y, and z directions is the strongest.