Two-Photon Micromaser with Initial Atomic Coherence

M. L. Ladrón de Guevara, Miguel Orszag, R. Ramírez +1 more

J. M. Raimond, L. Davidovich, M. Brune +1 more

A. F. Gomes, José Antonio Roversi, A. Vidiella-Barranco

We propose a two-photon micromaser-based scheme for the generation of a non-classical state from a mixed state. We conclude that a faster, as well as a higher degree of field purity, is achieved in comparison to one-photon processes. We investigate the statistical properties of the resulting field states, for initial thermal and (phase-diffused) coherent states. Quasiprobabilities are employed to characterize the state of the generated fields

P. L. Knight

Sun Wei-Hui, Si-de Du, Chen Xiao-Shuang

We investigate the quantum dynamics of a two-photon micromaser pumped by atoms injected in the superposition state of the upper and intermediate levels. We simulate a master equation governing the system by the Monte Carlo wavefunction approach and analyse the steady-state behaviour as a function of the atomic transit time. The atomic coherence can effectively enhance the intensity and sub-Poissonian of the cavity field as compared with the atomic mixture. It is also discovered that the phase of the cavity field can be shifted by adjusting the detuning between the atom and field. This result shows that it is possible to manipulate the phase of the cavity field by detuning, due to atomic coherence.

Imrana Ashraf, Muhammad Suhail Zubairy