Enhancing Steady-State Entanglement Generated by a Nondegenerate Three-Level Laser with Thermal Reservoir

Figure 1

Schematic representation of a nondegenerate three-level laser coupled to a two-mode thermal reservoir. Here, is the amplitude of the driving coherent light that couples the top and bottom levels of the atom. And also is the cavity damping constant and it is assumed the same for both transitions. The top, intermediate, and bottom levels of the three-level atom are denoted by , , and , respectively, where are the number of atoms inside the cavity. When the atom makes a transition from level and from levels , two photons with different frequencies ( and ) are emitted (color online).