Quantum Teleportation And It's Physical Implementation Based On Ion-trapped System

With the development and combining of quantum physics and information science, developing the information science based on the fundamental principles of quantum physics, and breaking through the physics limit of classical information technology, a rising inter-discipline is born, which is quantum information. Some new information function, which can't be realized via the classical information technology, can be realized via quantum information technology. Thereby, quantum information arouses the huge interest of the international academic community, attracts much research attention in Western countries and then develops quickly. Entanglement is a unique feature of quantum mechanics and is also the core of quantum information. One of the best-known applications of entanglement is teleportation. Teleportation plays an important role in the development of quantum computation and quantum communication. Since the original idea of teleportation introduced in 1993 by Bennett, the teleportation has been rapidly and widely developed and has made breakthrough progress in the experiment. With the advancement of times, people are dedicating themselves to seek some appropriate physical system to realize quantum information technology. Since the theoretic scheme of realizing quantum computing on ion trap proposed by Cirac, ion trap have already drawn much attention in quantum information processing and now no less than 20 research groups specialize in study of quantum information processing in ion trap. The main results of this Master Thesis are divided into two aspects as follows.First, with regard to theoretical research of teleportation, a criterion for teleportation is proposed, and the entanglement match between the measurement base and the quantum channel for teleportation is discussed.1 The criterion for teleportation, summarizes the teleportation protocols proposed in the recent literatures, and provides a principle of the design for teleportation protocol.2 We give a preliminary discussion on features of the entangled state theoretically, especially we propose the entanglement structure of bipartite maximally entangled state, which lays the foundations for discussing entanglement match between the measurement basis and the quantum channel for teleportation. The main innovation is to propose concept of entanglement structure match. That is, the entanglement match includes the entanglement degree match, which determines whether the entanglement resources is wasted, and the entanglement structure match, which determines whether the entanglement structure is residual.Second, the implementation of teleportation based on ion-trapped system is discussed.1 A controlled phase gate is constructed by using Sorensen and Molmer's hot ion quantum computing model.2 Based on the preceding studies, a quantum teleportation theoretic scheme of teleporting arbitrarily two-ion state by using genuine four-ion entangled state as quantum channel in Sorensen and Molmer's hot ion quantum computing model is proposed.