Limiting characteristics of superradiance

L. I. Men’shikov

L. M. Biberman, А. И. Глейзер, Г. А. Кобзев

Relationships among the gain coefficient, radiation flux, and energy conversion coefficients, are studied theoretically for a gas undergoing superradiance.(AIP)

Takeshi Baba, Kensuke S. Ikeda

Macroscopic fluctuation of superradiance most sensitively appears as the fluctuation of the polarized photon number. This fluctuation is not much affected by unexpected variation of the exciting pulse area. In the superradiance limit the relative fiuctuation of the polarized photon number is equal to \(\sqrt{1/3}\), and it decreases rapidly as the atomic number density is reduced below a threshold density. Such a characteristic change is attributed to a transition from the superradiant emission to the amplified spontaneous emission.

M. T. Turaev, FRANK J. CROWNE

Sebastian Fuchs, Joachim Ankerhold, M. P. Blencowe +1 more

Abstract The dynamics of the Dicke model, which describes the interaction of N two-level atoms with a resonant field mode, is studied in the presence of dissipation and in strong non-equilibrium for a moderate number of atoms. Starting from a highly excited state, it is investigated to what extent signatures of superradient phenomena known from the thermodynamic limit , namely, superradiant light emission and atom-field correlations characteristic for the superradiant phase, appear on transient time scales. Attention is also paid to subtleties of modeling dissipation in the weak coupling limit and to the dynamics in phase space. The latter allows phase space correlators to be defined as indicators for collective behavior on transient time scales. These findings may be of relevance for the realization of Dicke physics with superconducting circuits.

Kyungwon An, James R Harries, Susumu Kuma