A phase-space approach for performing continuous-variable quantum teleportation with a non-Gaussian resource

Abstract:We present a detailed phase-space analysis of continuous-variable quantum teleportation using a photon-subtracted two-mode squeezed Fock state (PS-TMSFS) as an entangled resource. We investigate the performance of PS-TMSFS within the Braunstein-Kimble teleportation protocol. The resource-state preparation is described and the success probability related to the photon-subtraction process is derived analytically. The Wigner characteristic function of PS-TMSFS is calculated and then employed to determine the fidelity for input Gaussian and non-Gaussian states. The dependence of the success probability and the teleportation fidelity on the squeezing parameter and the beam-splitter transmissivity is analyzed for both symmetric and asymmetric photon-subtraction scenarios. This results that the symmetric photon subtraction consistently outperforms the corresponding asymmetric configurations with the $(2,2)$ configuration providing the highest teleportation fidelity among the considered PS-TMSFS resources. A significant improvement over the Gaussian two-mode squeezed vacuum (TMSV) resource is observed for teleporting Gaussian input states, particularly in the low-squeezing regime, whereas the relative advantage for non-Gaussian input states depends on the functioning resource parameters and gradually diminishes as squeezing increases.

arXiv:2606.25471 [quant-ph]

(or arXiv:2606.25471v2 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2606.25471 Focus to learn more arXiv-issued DOI via DataCite

https://doi.org/10.1016/j.physleta.2026.132150 Focus to learn more DOI(s) linking to related resources

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