Quantum Teleportation And Signature Of Single Particles And Two Particles In Special Quantum Channels

In this information age, people were gradually increasing demand for information. People have made great achievements about theory and experiment of quantum communication with the advent of quantum computers. Quantum teleportation, as an important branch of quantum communication, has become an important topic since Bennet proposed in 1993. Quantum teleportation was actually a quantum information separation between the sender and the recipient by entanglement. After the sender separated the initial quantum state by quantum separation method, the sender sent the corresponding particles to the appropriate recipient. In the entire process, the recipient was unable to get content information, and the recipient got the original information only when the sender cooperation with the recipient. With the advent of quantum computers, the classical signature become insecurity based on the intractability of the mathematical problem, so quantum signature comes. Quantum signature was safe due to the unconditional security of the physical and mechanical properties. The main contents are as follower.1. First of all, we introduce the development trend of quantum teleportation and quantum signature, as well as related research significance of quantum teleportation.2.The paper analyzes a scheme about using χ-particle entangled states teleport unknown two-particle quantum state and unknown single particle quantum state in entanglement channel remains unchanged; Further analysis of the unknown two-particle quantum states teleportation scheme in entangled channel unchanged. In this case, both saved entangled resources and achieved two particles transmit two particles in high-efficiency.3. Design a single-particle quantum state teleportation scheme based on theoretical knowledge of quantum teleportation by improved the quantum channel, and applied to quantum signature. Compared to traditional digital signature based on the intractability of the mathematical problem, the scheme made use of unconditional security of quantum key distribution agreements and one-time pad encryption algorithm to ensure the security of the scheme.