Optomechanical quantum teleportation

TL;DR

This paper demonstrates quantum teleportation of an optical qubit onto nanomechanical resonators, showcasing a key step towards optomechanical quantum network nodes and quantum repeaters.

Contribution

It presents the first successful teleportation of an optical state onto a dual-rail optomechanical quantum memory, advancing quantum communication technology.

Findings

Achieved quantum teleportation onto nanomechanical resonators.

Stored and retrieved arbitrary qubit states in optomechanical memory.

Demonstrated a functional quantum repeater node.

Abstract

Quantum teleportation, the faithful transfer of an unknown input state onto a remote quantum system, is a key component in long distance quantum communication protocols and distributed quantum computing. At the same time, high frequency nano-optomechanical systems hold great promise as nodes in a future quantum network, operating on-chip at low-loss optical telecom wavelengths with long mechanical lifetimes. Recent demonstrations include entanglement between two resonators, a quantum memory and microwave to optics transduction. Despite these successes, quantum teleportation of an optical input state onto a long-lived optomechanical memory is an outstanding challenge. Here we demonstrate quantum teleportation of a polarization-encoded optical input state onto the joint state of a pair of nanomechanical resonators. Our protocol also allows for the first time to store and retrieve an arbitrary qubit state onto a dual-rail encoded optomechanical quantum memory. This work demonstrates the full functionality of a single quantum repeater node, and presents a key milestone towards applications of optomechanical systems as quantum network nodes.