2017/04/28 by Stephan Welte, Bastian Hacker, Severin Daiss +2 · 1 citation
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physrevlett.118.210503
published as Phys. Rev. Lett. 118, 210503 (2017) · 9 pages, 7 figures including Supplement
arxiv created 2017/04/28 · arxiv updated 2017/05/30
We demonstrate entanglement generation of two neutral atoms trapped inside an optical cavity. Entanglement is created from initially separable two-atom states through carving with weak photon pulses reflected from the cavity. A polarization rotation of the photons heralds the entanglement. We show the successful implementation of two different protocols and the generation of all four Bell states with a maximum fidelity of (90+-2)%. The protocol works for any distance between cavity-coupled atoms, and no individual addressing is required. Our result constitutes an important step towards applications in quantum networks, e.g. for entanglement swapping in a quantum repeater.