Experimental demonstration of quantum teleportation of broadband squeezing

TL;DR

This paper reports the first unconditional teleportation of broadband entanglement in optical squeezed states, demonstrating high-fidelity teleportation capable of preserving broadband quantum features.

Contribution

It presents an experimental demonstration of teleporting broadband entanglement with high fidelity, enabling potential cascaded non-Gaussian quantum operations.

Findings

Teleportation of squeezed states with -0.8 dB squeezing preserved.

First unconditional teleportation of broadband entanglement.

Fidelity high enough for cascading teleportation processes.

Abstract

We demonstrate an unconditional high-fidelity teleporter capable of preserving the broadband entanglement in an optical squeezed state. In particular, we teleport a squeezed state of light and observe $-0.8 \pm 0.2$dB of squeezing in the teleported (output) state. We show that the squeezing criterion translates directly into a sufficient criterion for entanglement of the upper and lower sidebands of the optical field. Thus, this result demonstrates the first unconditional teleportation of broadband entanglement. Our teleporter achieves sufficiently high fidelity to allow the teleportation to be cascaded, enabling, in principle, the construction of deterministic non-Gaussian operations.