Continuous Variable Quantum Teleportation in a Dissipative Environment: Comparison of Non-Gaussian Operations Before and After Noisy Channel

This article explores the relative advantages in continuous-variable quantum teleportation when non-Gaussian operations, namely, photon subtraction, addition, and catalysis, are performed before and after interaction with a noisy channel. The resource state for teleporting unknown coherent and squeezed vacuum states is generated using two distinct strategies: i) Implementation of non-Gaussian operations on two mode squeezed vacuum (TMSV) state before interaction with a noisy channel, ii) Implementation of non-Gaussian operations after interaction of TMSV state with a noisy channel. The results show that non-Gaussian operations can enhance teleportation fidelity in a dissipative environment. However, the most advantageous non-Gaussian operation and appropriate strategy depend on the state and channel parameters. The results suggest that employing such strategies can be advantageous in other non-Gaussian continuous variable quantum information (QIP) processing tasks in a dissipative environment. Dissipation is an undesirable but unavoidable effect in real-life practical scenarios that adversely affects the performance of quantum information processing (QIP) tasks such as quantum teleportation. The current work explores strategies to reduce the ill-effects of dissipation in non-Gaussian operations based continuous variable quantum teleportation. image