Continuous-Variable Telecloning with Phase-Conjugate Inputs

TL;DR

This paper introduces schemes for continuous-variable telecloning with phase-conjugate inputs, utilizing entangled states and linear optics to achieve optimal cloning fidelities in the limit of infinite squeezing.

Contribution

It presents novel protocols for PCI telecloning that require fewer entangled resources and are reversible, achieving optimal fidelities.

Findings

Achieves optimal cloning fidelities with infinite squeezing.

Uses minimal entangled resources for nonlocal and local cloning.

Protocols are reversible and experimentally feasible.

Abstract

We propose a scheme for continuous-variable telecloning with phase-conjugate inputs (PCI). Two cases of PCI telecloning are considered. The first case is where PCI telecloning produces $M$ clones nonlocally and $M$ anticlones locally, or vice versa. This kind of PCI telecloning requires only one EPR (Einstein-Podolsky-Rosen) entangled, two-mode squeezed state as a resource for building the appropriate multi-mode, multipartite entangled state via linear optics. The other case is a PCI telecloning protocol in which both clones and anticlones are created nonlocally. Such a scheme requires two EPR entangled states for the generation of a suitable multipartite entangled state. As our schemes are reversible, optimal cloning fidelities are achieved in the limit of infinite squeezing.