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**Enhancing steady-state entanglement generated by a nondegenerate three-level laser with thermal reservoir.**
*(English)*
Zbl 1480.81014

Summary: We analyze a nondegenerate three-level cascade laser with an open cavity and coupled to a two-mode thermal reservoir employing the stochastic differential equations for atomic operators associated with the normal ordering. Applying the large-time approximation scheme, we obtain the solutions for the corresponding equations of evolution of the expectation values of atomic operators. Furthermore, employing the resulting solutions, we studied the photon as well as cavity atomic-state entanglement amplification of the cavity radiation.

### MSC:

81P40 | Quantum coherence, entanglement, quantum correlations |

78A60 | Lasers, masers, optical bistability, nonlinear optics |

81S22 | Open systems, reduced dynamics, master equations, decoherence |

81V45 | Atomic physics |

35P15 | Estimates of eigenvalues in context of PDEs |

81V80 | Quantum optics |

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\textit{T. Abebe} et al., Adv. Math. Phys. 2021, Article ID 5550206, 11 p. (2021; Zbl 1480.81014)

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