Purification of Single-photon Entanglement
D. Salart, O. Landry, N. Sangouard, N. Gisin, H. Herrmann, B., Sanguinetti, C. Simon, W. Sohler, R. T. Thew, A. Thomas, and H. Zbinden
TL;DR
This paper demonstrates the first experimental purification of single-photon entanglement using a linear-optics protocol, enhancing its potential for quantum communication and repeater applications.
Contribution
It presents the first experimental realization of single-photon entanglement purification with a straightforward linear-optics method.
Findings
Successful purification of single-photon entanglement achieved
Potential applications in long-distance quantum communication demonstrated
Simplifies entanglement purification process for quantum networks
Abstract
Single-photon entanglement is a simple form of entanglement that exists between two spatial modes sharing a single photon. Despite its elementary form, it provides a resource as useful as polarization-entangled photons and it can be used for quantum teleportation and entanglement swapping operations. Here, we report the first experiment where single-photon entanglement is purified with a simple linear-optics based protocol. Besides its conceptual interest, this result might find applications in long distance quantum communication based on quantum repeaters.
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