Scheme for the implementation of optimal cloning of arbitrary single particle atomic state into two photonic states

摘要

We present a feasible scheme to implement the $1 \to 2$ optimal cloning ofarbitrary single particle atomic state into two photonic states, which isimportant for applications in long distance quantum communication. Our schemealso realizes the tele-NOT gate of one atom to the other distant atom trappedin another cavity. The scheme is based on the adiabatic passage and thepolarization measurement. It is robust against a number of practical noisessuch as the violation of the Lamb-Dicke condition, spontaneous emission anddetection inefficiency.