Continuous variable quantum teleportation in a dissipative environment: Comparison of non-Gaussian operations before and after noisy channel

TL;DR

This paper compares the effectiveness of applying non-Gaussian operations before or after a noisy channel in continuous-variable quantum teleportation, revealing that the optimal strategy depends on specific operational and environmental parameters.

Contribution

It introduces a comparative analysis of non-Gaussian operations performed before and after noisy channels in CV quantum teleportation, highlighting conditions for optimal strategy selection.

Findings

The advantage of non-Gaussian operations depends on the type of operation and initial squeezing.

Applying operations before or after the noisy channel yields different benefits based on channel parameters.

The study guides improved strategies for quantum information tasks in dissipative environments.

Abstract

We explore 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. We generate the resource state for teleporting unknown coherent and squeezed vacuum states using two distinct strategies: (i) Implementation of non-Gaussian operations on 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 either of the two strategies could be more beneficial than the other depending on the type of the non-Gaussian operation, the initial squeezing of the TMSV state, and the parameters characterizing the noisy channel. This strategy can be utilized to effectively improve the efficiency of various non-Gaussian continuous variable quantum information processing tasks in a dissipative environment.