摘要
We propose a quantum error-rejection scheme for direct communication with three-qubit quantum codes based on the direct communication of secret messages without any secret key shared in advance. Given the symmetric and independent errors of the transmitted qubits, our scheme can tolerate a bit of error rate up to 33.1%, thus the protocol is deterministically secure against any eavesdropping attack even in a noisy channel.
We propose a quantum error-rejection scheme for direct communication with three-qubit quantum codes based on the direct communication of secret messages without any secret key shared in advance. Given the symmetric and independent errors of the transmitted qubits, our scheme can tolerate a bit of error rate up to 33.1%, thus the protocol is deterministically secure against any eavesdropping attack even in a noisy channel.
基金
supported partly by the National Natural Science Foundation of China (Grant Nos 10774163, 10804132 and 10747167)
the Natural Science Foundation Project of Chongqing, Chongqing Science and Technology Committee (CQ CSTC) (Grant No2008BB0152)
partly by the National Major Fundamental Research Program of China (Grant No 2006CB921203)
