Cooling and Crystallization of Trapped 113Cd+ Ions for Atomic Clock

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（1）
• 页码范围: 71-74
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/1/013703

摘要

Laser-cooled trapped ions can be considered as a nearly isolated system.Hence,in this system the ions are unperturbed and have a long decoherence time.In recent years,quantum information processing experiments taking advantage of this characteristic of the trapped ions have made great progress.[1-4] Due to the long interaction time between the radiation field and the atomic ions,high-resolution spectroscopic measurement of the trapped ions can also be performed.Practically,this offers several promising candidates for atomic clocks with both ultra-high stability and accuracy.[5,6] Compared to ions cooled by collision with buffer gas,the frequency standards based on laser-cooled ions can greatly reduce the secondorder Doppler frequency shift (SODFS) by minimizing micromotion and thermal secular motion.