The Quantum Operation Based On The Ion Trap And Stimulated Raman Adiabatic Technology

With the development of quantum information science, quantum informationprocessing has become one of the important topics in the study of physics andinformation science.Quantum computing as an important part of quantum informationprocessing,become the focus of the people Since1995, when Criac and Zoller putforward the quantum computing scheme of cold ion trap, the quantum informationprocessing which based on the trapped ions, have obtained the rapid development.Thequantum operations with trapped ions based the technology of stimulated Ramanadiabatic technology, which have important theoretical and practical significance. Thispaper mainly studied on the basis of ion trap quantum computing scheme and usingstimulated Raman adiabatic quantum operations.1. Introduce the basic theory and basic physical implementation of quantumcomputing, andtheory structure of the ion trap, especially the implementation of thetechnology of stimulated Raman adiabatic process, and the interaction of trapped ionand light field is introduced in detail.2. Introduce quantum computing scheme based on trapped ion. Respectivelyfrom the original cold trapped ion of quantum computing proposed by Criac andZoller,and in1999M Φ lmer and S Φ zensen proposed thermal ion quantum computingscheme, which external vibration state is not sensitive to the ion, and in the process ofthe operation is not sensitive to the change of the collective vibration states, and hasstrong fault tolerance of geometric quantum computation is presented in three aspects.3. Proposed a scheme for the two-bit quantum controlled phase gate by usingstimulated Raman adiabatic technology with hot trapped ions, which have four-leveltripod structure, and on this basis, after the continuous operation to generating thecluster state of multi-qubits. The two operation process in the experimental operation issimple, in the evolution process, only need to adjust the coupling intensity and phase oflaser The scheme combines the advantages of both the adiabatic passage an the mode oftrapped ions in thermal motion. The experiment requirements can be more readilyrealized and the fidelity of the entangling gates may be further enhanced.4. Proposed a scheme for generation of symmetric Dicke state of many atomicqubits by adiabatic passage with clod trapped ions after a continuousoperation. Throughto the longitudinal vibration mode and transverse mode of collective vibration of trapped ions, instead of a scheme of two-mode cavity structure. Main advantage of thisscheme is the project that various Dicke states can be generated step by step incontinuous operation.