Two-mode Gaussian entangled state generated by correlated emission laser as a resource for continuous-variable quantum teleportation
Haleema Sadia Qureshi, Fazal Ghafoor · Applied Optics · 2025
Quantum teleportation, one of the most significant protocols in quantum information processing, allows the unembodied transfer of an unknown quantum state from one location to another distinct location. Here, we propose a scheme of continuous-variable quantum teleportation, wherein the two-mode Gaussian entangled state generated by a correlated spontaneous emission laser (CEL) system is used as a quantum resource. Initially, the two quantized cavity fields, in the form of single-mode Gaussian states characterized by the non-classicality and purity of the states, along with a strong classical field, are coupled to the gain medium of the CEL system. We consider a squeezed coherent state (SCS) for the teleportation process and calculate the time-dependent expression for its teleportation fidelity using the Wigner function formalism. In this framework, we thoroughly analyze the teleportation of the SCS, using its fidelity, for various parameters of the proposed system. We show that the amplified entanglement generated by the CEL system leads to an optimized fidelity for the teleportation of SCS.