Effects of single-qubit quantum noise on entanglement purification
Benenti, G, Felloni, S, Strini, G · CERN Document Server (European Organization for Nuclear Research) · 2005
We study the stability under quantum noise effects of the quantum privacy amplification protocol for the purification of entanglement in quantum cryptography. A systematic numerical study of the impact of all possible single-qubit noise channels is performed. We find that both the qualitative behavior of the fidelity of the purified state as a function of the number of purification steps and the maximum level of noise that can be tolerated by the protocol strongly depend on the specific noise channel. These results provide valuable information for experimental implementations of the quantum privacy amplification protocol.