1. Entanglement Swapping with Photons Generated on Demand by a Quantum Dot
- Author
-
Katharina D. Zeuner, Davide Tedeschi, F. Basso Basset, Armando Rastelli, S. F. Covre da Silva, Christian Schimpf, Marcus Reindl, Klaus D. Jöns, Michele B. Rota, Rinaldo Trotta, and Val Zwiller
- Subjects
Physics ,Quantum Physics ,Quantum network ,Photon ,Condensed Matter - Mesoscale and Nanoscale Physics ,quantum entanglement ,semiconductor quantum optics ,quantum networks ,FOS: Physical sciences ,TheoryofComputation_GENERAL ,General Physics and Astronomy ,Quantum entanglement ,Topology ,01 natural sciences ,Quantum technology ,Quantum dot ,Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ,0103 physical sciences ,Nonclassical light ,Quantum Physics (quant-ph) ,010306 general physics ,Quantum information science ,Quantum - Abstract
Photonic entanglement swapping, the procedure of entangling photons without any direct interaction, is a fundamental test of quantum mechanics and an essential resource to the realization of quantum networks. Probabilistic sources of non-classical light can be used for entanglement swapping, but quantum communication technologies with device-independent functionalities demand for push-button operation that, in principle, can be implemented using single quantum emitters. This, however, turned out to be an extraordinary challenge due to the stringent requirements on the efficiency and purity of generation of entangled states. Here we tackle this challenge and show that pairs of polarization-entangled photons generated on-demand by a GaAs quantum dot can be used to successfully demonstrate all-photonic entanglement swapping. Moreover, we develop a theoretical model that provides quantitative insight on the critical figures of merit for the performance of the swapping procedure. This work shows that solid-state quantum emitters are mature for quantum networking and indicates a path for scaling up., Comment: The first four authors contributed equally to this work. 17 pages, 3 figures
- Published
- 2019