Preparation of Macroscopic Quantum-Interference States for a Collection of Trapped Ions Via a Single Geometric Operation  

作　　者：林丽华 

机构地区：[1]Department of Physics and State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University

出　　处：《Communications in Theoretical Physics》2010年第5期920-922,共3页理论物理通讯（英文版）

基　　金：Supported by Funds from the State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University

摘　　要：We describe a scheme for the generation of macroscopic quantum-interference states for a collection of trapped ions by a single geometric phase operation. In the scheme the vibrational mode is displaced along a circle with the radius proportional to the number of ions in a certain ground electronic state. For a given interaction time, the vibrational mode returns to the original state, and the ionic system acquires a geometric phase proportional to the area of the circle, evolving from a coherent state to a superposition of two coherent states. The ions undergo no electronic transitions during the operation. Taking advantage of the inherent fault-tolerant feature of the geometric operation, our scheme is robust against decoherence.

关 键 词：Imacroscopic quantum-interference state trapped ion geometric phase 

分 类 号：O413.1[理学—理论物理]