Effect of Quantum Noise on the Controlled Remote Preparation via the Brown State.

Gao et al. have studied the controlled remote preparation of arbitrary two- and three-qubit states via the Brown state as the entangled channel. But these schemes are considered in ideal environment. In this paper, we take the scheme of preparing an arbitrary two-qubit state as an example and reinvestigate it in five-type noises: the bit flip, phase flip, bit-phase flip, phase-damping and amplitude-damping noise. The fidelity is adopted to describe how close the output state with the prepared state are. It is found that the fidelity of the output state is dependent on the coefficients of the prepared state and the noise parameter in five-type noises. Interestingly, the fidelity is irrelated to the participators’ measurement results except in the amplitude-damping noise. [ABSTRACT FROM AUTHOR]