Working with Atoms

Oskar J. Painter

Guobin Liu, Sihong Gu

We have set up a coherent population trapping (CPT)-based atomic magnetometer experimental system worked with (87)Rb atoms, and with this system experimentally investigated the behaviour of a CPT magnetometer prototype proposed by us, which worked with the atomic energy level modulation scheme. Through systematical comparison with generally used microwave frequency modulation scheme, the experimental results reveal that the energy level modulation scheme not only extends the detection range, but also improves the sensitivity of magnetic field detection.

Xinqi Wang, Yuzhu Wang

A new prototype atomic fountain clock working in the micro-gravity environment is proposed. The successive Ramsey interactions of cold atoms and oscillatory field are realized by means of computer-controlled periodic motion of oscillatory field while the cold atoms stay still relatively in the prototype. Preliminary analyses in comparison with the atomic fountain clock working on the ground show that higher stability is obtainable in the prototype.

Szabolcs Iván

Charles Alfred Coulson

Zhuolin Ye, Yingying Hu, Jizhou He +1 more

Abstract We study the performance of a cyclic heat engine which uses a small system with a finite number of ultracold atoms as its working substance and works between two heat reservoirs at constant temperatures T h and T c (