We present the influence of phase fluctuations on the entanglement and intensity of the radiation produced by a correlated-emission laser. The three-level atoms are initially prepared in a partial coherent superposition of the ground and exited states, and the driven radiation field incoming via the input mirror induces the atomic coherence that leads to the entanglement in the quantum system. The laser cavity also contains a nondegenerate parametric amplifier and is seeded by a two-mode squeezed light. The entanglement is analyzed by applying the Duan–Giedke–Cirac–Zoller (DGCZ) and logarithmic negativity inseparability criteria for a continuous variable system. We find that the phase fluctuation remarkably reduces the amount of entanglement in the weak driving field. On the other hand, the driven field completely overcomes the influence of phase fluctuations in the strong driving field, so that the entanglement remains in its highest degree (97%) in this regime.

我们介绍了相位波动对相关发射激光器产生的纠缠和辐射强度的影响。三能级原子最初是准备成基态和出射态的部分相干叠加，并且通过输入镜入射的驱动辐射场会引起原子相干，从而导致量子系统纠缠。激光腔还包含一个非简并参量放大器，并由双模压缩光注入。通过对连续变量系统应用Duan-Giedke-Cirac-Zoller（DGCZ）和对数负性不可分性标准来分析纠缠。我们发现，相位波动显着减少了弱驱动场中的纠缠量。另一方面，