Photon emission by two two-level atoms in a two-mode lossy cavity

C. Di Fidio, W. Vogel, M. Khanbekyan +1 more

The dynamics of an initially excited two-level atom in a lossy cavity is studied by using the quantum trajectory method. Unwanted losses are included, such as photon absorption and scattering by the cavity mirrors and spontaneous emission of the atom. Based on the obtained analytical solutions, it is shown that the shape of the extracted spatiotemporal radiation mode sensitively depends on the atom-field interaction. In the case of a short-term atom-field interaction we show how different pulse shapes for the field extracted from the cavity can be controlled by the interaction time.

M. Kozierowski, A. A. Mamedov, S. M. Chumakov

Sun Yu-hang, Xiao-Qiang Xi, 西安邮电学院应用数理系，西安 710121

A two-level atom passing through double spatially separated single-mode cavity fields is studied. We investigate the effecting factors of photon emission probabilities of the atom, which include the kinetic energy of the atom, the length of the cavity and the separation between the two cavities. The results show that in the case of ultra-cold atom, when the kinetic energy of the atom is small (k/k0k/k0>1), the length of the cavity has great effect on the photon emission probabilities. The present work shows that the photon emission probabilities may be modulated by controlling the center-of-mass motion of the atom.

M. Kozierowski, S. M. Chumakov, A. A. Mamedov

James Clemens

Adagn Addisu Dabulo

Abstract This study investigates a three-level laser system featuring a cascade-configured atom interacting with squeezed vacuum radiation within a lossy cavity, where the cavity modes are linked to a vacuum reservoir. By employing steady-state solutions derived from the expectation values of atomic operators and quantum Langevin equations for the cavity mode operators, we have calculated key quantum optical properties, including the mean photon number, normalized second-order correlation functions, and quadrature variances for cavity modes a 1 , a 2 , and their combined two-mode light. The findings reveal that the mean photon number of the two-mode light equals the sum of the individual mode photon numbers. Additionally, the influence of spontaneous and stimulated emissions, along with the squeeze parameter, is shown to enhance the mean photon numbers of the cavity modes. The results further suggest that the cavity modes exhibit thermal light characteristics, with the mean photon number of mode a 1 exceeding that of mode a 2 , as depicted in the analyzed graphs and equations.