Quantum state manipulation of single-Cesium-atom qubit in a micro-optical trap  

作　　者：Zhi-Hui Wang Gang Li Ya-Li Tian Tian-Cai Zhang 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China

出　　处：《Frontiers of physics》2014年第5期634-639,共6页物理学前沿（英文版）

基　　金：Acknowledgements This work was supported by the National Basic Research Program of China （Grant No. 2012CB921601） and the National Natural Science Foundation of China （Grants Nos. 11125418, 91336107, 61275210, 61227902, and 61121064）.

摘　　要：Based on single Cesium atoims trapped in a 1064 nm microscopic optical trap we have exhibited a single qubit encoded in the Cesium ＂clock states＂. The single qubit initialization, detection and the fast state rotation with high efficiencies are demonstrated and this state manipulation is crucial for quantmn information processing. The ground ~ates Rabi flopping rate of 229.0 ± 0.6 kHz is realized hy a two-photon Raman process. A clock states dephasing time of 3.0 ± 0.7 ms is measured, while all irreversible homogeneous dephasing time of 124 ± 17 ms is achieved by using the spin-echo technique. This well-controlled single atom provides an ideal quantmn qubit and quantmn node for quantum information processing.Based on single Cesium atoims trapped in a 1064 nm microscopic optical trap we have exhibited a single qubit encoded in the Cesium ＂clock states＂. The single qubit initialization, detection and the fast state rotation with high efficiencies are demonstrated and this state manipulation is crucial for quantmn information processing. The ground ~ates Rabi flopping rate of 229.0 ± 0.6 kHz is realized hy a two-photon Raman process. A clock states dephasing time of 3.0 ± 0.7 ms is measured, while all irreversible homogeneous dephasing time of 124 ± 17 ms is achieved by using the spin-echo technique. This well-controlled single atom provides an ideal quantmn qubit and quantmn node for quantum information processing.

关 键 词：QUBIT single atom Rabi flopping SPIN-ECHO dephasing time 

分 类 号：O413.1[理学—理论物理] TN248[理学—物理]