Entanglement distribution protocols under imperfect fidelity and quantum memory conditions
This work provides an incremental improvement to entanglement distribution protocols, which is crucial for the development of a quantum Internet.
This paper addresses the challenge of long-distance quantum bit transmission by improving an existing entanglement distribution protocol. The proposed Locally Heralded Distribution (LHD) protocol shortens execution time and increases link success probability, outperforming some previous protocols in simulations.
The rapid development of quantum computers and sensors urges for the development of a quantum Internet capable of transmitting quantum bits over long distances. Photons used for quantum data transfer are fragile over time and sensitive to their environment, so that they cannot be directly used over long distances. To remedy this problem, long distance paths are segmented into shorter links and entangled pairs of photons are distributed over these links and swapped to create end-to-end entangled pairs over long distances, eventually used for teleportation. In this paper, we develop an existing protocol taking account of fidelity and imperfect memories. We shorten the execution time and thus increase its link success probability creating the so-called Locally Heralded Distribution (LHD). It turns out that the proposed protocol outperforms some previous protocols. We benchmark through simulation the performances of protocols considered in this paper by using a blind entanglement protocol as a baseline.