  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 creating a coherent
superposition of vacuum-one photon states on a single mode with linear optics.
Previous realizations using such an encoding strongly relied on ancillary modes
of the electromagnetic field, which only allowed the teleportation of
subsystems of entangled states. Here, we enable quantum teleportation of
genuine vacuum-one photon states avoiding ancillary modes, by exploiting
coherent control of a resonantly excited semiconductor quantum dot in a
micro-cavity. Within our setup, we can teleport vacuum-one-photon qubits and
perform entanglement swapping in such an encoding. Our results may disclose new
potentialities of quantum dot single-photon sources for quantum information
applications.
