Superradiance and subradiance in the overdamped many-atom micromaser (5 pages)

Vasily V. Temnov, Mikhail I. Kolobov, Fritz Haake

Shi-Qing Tang, Ji-Bing Yuan, Le‐Man Kuang +1 more

Vasily V. Temnov

It is shown by means of quantum trajectory simulations that two different types of collective behavior are possible in the overdamped many-atom micromaser. Depending on the parameters, the micromaser can either superradiate or subradiate. This alternative corresponds to positive or negative correlations between the dipole moments of individual intracavity atoms. We perform simulations with realistic parameters to show that superradiance and subradiance should be observable with available experimental setups.

Igor Ferrier-Barbut

Chengdong Mi, Khan Sadiq Nawaz, Liangchao Chen +5 more

The collective spontaneous emission of many atoms is significantly different from that of a single atom, depending on the geometry and the phase correlation of atomic ensembles. However, experimental observation of arbitrary superradiant and subradiant states of atoms remains challenging due to the difficulties in both preparation and detection of those states. Here we report the time-resolved observation of superradiance from a timed Dicke state in a momentum-space superradiance lattice of Bose-Einstein condensates, which enables an in situ measurement of the coherent lattice dynamics involving both superradiant and subradiant states. The long-lasting oscillation in the superradiant emission is contributed by population transport from the subradiant states in the superradiance lattice. This work paves the way to prepare and observe subradiant states, which has promising applications in quantum information processing.

J. A. Mlynek, A. A. Abdumalikov, Christopher Eichler +1 more