Entanglement generation in a two-mode single-atom laser

Xin‐You Lü, Peijun Song, Pei Huang +1 more

Tamirat Abebe, Ebisa Mosisa, Chimdessa Gashu Feyisa

Martin Kiffner, Muhammad Suhail Zubairy, Jörg Evers +1 more

A two-mode single-atom laser is considered, with the aim of generating entanglement in macroscopic light. Two transitions in the four-level gain medium atom independently interact with the two cavity modes, while two other transitions are driven by control laser fields. Atomic relaxation as well as cavity losses are taken into account. We show that this system is a source of macroscopic entangled light over a wide range of control parameters and initial states of the cavity field.

Xin‐You Lü, Jibing Liu, Liu-Gang Si +1 more

This paper investigate the generation and evolution of continuous-variable entanglement in a two-mode single-atom laser, where the atomic coherence is induced by two classical laser fields (pump and coupling field) driving the corresponding atom transitions. It is found that the intensity of the coupling field can influence effectively the entanglement period of the cavity field. More importantly, our numerical results also show that the intensity and period of entanglement between the two cavity modes as well as the total mean photon number of the cavity field can be increased synchronously by adjusting the corresponding frequency detuning.

Xiang Hao, Shijun Zhu

Manzoor Ikram, Gao‐xiang Li, Muhammad Suhail Zubairy

We analyze the quantum correlations between side modes of a quantum beat laser when a two-level atomic medium is driven strongly by a classical field. The squeezing and the entanglement generation of the cavity radiation are investigated. It turns out that there is neither squeezing nor entanglement when the strong driving field is resonant with the atomic transition but the generated light exhibits both two-mode squeezing and entanglement when the driving field is tuned away from the atomic transition.