A Novel Quantum Key Distribution Protocol on 4-dimensional Hilbert Space
四维Hilbert空间上的量子密钥分配协议

A novel quantum key distribution protocol is proposed in this paper,by constructing three different types of measurement bases.Such unusual construction guarantees that all possible errors occurred on two qubits can be detected,and provides the unconditional security proof.The most distinguishable advantage of the QKD protocol is saving a great amount of quantum and classical communications.