Teleportation of a genuine single-rail vacuum-one-photon qubit generated via a quantum dot source

TL;DR

This paper demonstrates the first successful teleportation of single-rail vacuum-one-photon qubits using a quantum dot source, enabling new quantum information processing capabilities with this encoding.

Contribution

It introduces a method for teleporting vacuum-one-photon qubits in a single mode using a quantum dot, overcoming previous limitations of linear optics.

Findings

Successfully teleported vacuum-one-photon qubits

Performed entanglement swapping with single-rail encoding

Showed potential for quantum information processing with quantum dot sources

Abstract

Quantum state teleportation represents a pillar of quantum information and a milestone on the roadmap towards quantum networks with a large number of nodes. Successful photonic demonstrations of this protocol have been carried out employing different qubit encodings. However, demonstrations in the Fock basis encoding are challenging, due to the impossibility of generating a coherent superposition of vacuum-one photon states on a single mode with linear optics. Indeed, previous realizations only allowed the teleportation of dual-rail entangled states, by exploiting ancillary electromagnetic modes. Here, instead, we enable the quantum teleportation of pure vacuum-one-photon qubits encoded in a single spatial mode, by exploiting coherent control of a resonantly excited semiconductor quantum dot in a micro-cavity. Within our setup, we can both teleport genuine single-rail vacuum-one-photon qubits and perform entanglement swapping. Our results may disclose new quantum information processing potentialities for this encoding, whose manipulation is achievable via quantum dot single-photon sources.