A photonic cluster state with a tree-type entanglement structure constitutes an efficient resource for quantum error correction of photon loss. But the generation of a tree cluster state with an arbitrary size is notoriously difficult. Here, we propose a protocol to deterministically generate photonic tree states of arbitrary size by using only a single quantum emitter. Photonic entanglement is established through both emission and re-scattering from the same emitter, enabling fast and resource-efficient entanglement generation. The same protocol can also be extended to generate more general tree-type entangled states.
@article{arxiv.2007.06608,
title = {Deterministic Generation of Loss-Tolerant Photonic Cluster States with a Single Quantum Emitter},
author = {Yuan Zhan and Shuo Sun},
journal= {arXiv preprint arXiv:2007.06608},
year = {2020}
}