Atomic clocks: A brief history and current status of research in India

Pramana

Aishik Acharya¹  Amitava Sen Gupta¹  Poonam Arora1¹  Suchi Yadav¹  Vattikonda Bharath¹  Aashish Agarwal¹  Amrita Awasthi¹ 

[1] Time and Frequency Division, CSIR-National Physical Laboratory, Dr K S Krishnan Road, New Delhi 110 012, India$$

关键词: Atomic physics;    frequency standards;    microwaves;    diode lasers.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Frequency corresponding to the energy difference between designated levels of an atom provides precise reference for making a universally accurate clock. Since the middle of the 20th century till now, there have been tremendous efforts in the field of atomic clocks making time the most accurately measured physical quantity. National Physical Laboratory India (NPLI) is the nation’s timekeeper and is developing an atomic fountain clock which will be a primary frequency standard. The fountain is currently operational and is at the stage of complete frequency evaluation. In this paper, a brief review on atomic time along with some of the recent results from the fountain clock will be discussed.

【 授权许可】

Unknown