Berlin 2024 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 18: Poster II
QI 18.37: Poster
Mittwoch, 20. März 2024, 11:00–14:30, Poster A
Entanglement Distribution - Towards a Suburban Quantum Network Link — •Pooja Malik1,2, Yiru Zhou1,2, Florian Fertig1,2, Tommy Block1,2, Maya Bueki3, Gianvito Chiarella3, Tobias Frank3, Pau Farrera3, Harald Weinfurter1,2,3, and Gerhard Rempe3 — 1Fakultät für Physik, Ludwig-Maximilians-Universität, Munich, Germany — 2Munich Center for Quantum Science and Technology (MCQST), Munich, German — 3Max-Planck-Institut für Quantenoptik, Garching, Germany
A multi-node quantum network will be a platform for distributed quantum computing and secure quantum communication. Heralded entanglement between the distant nodes is the first step towards this grand goal. To this end, we present the plan to entangle two Rubidium atom-based nodes. At node 1, the atom is trapped in a red detuned optical light field [1] while at node 2, the atom is trapped at the crossing point of the cavity modes inside a 3D optical lattice [2]. These nodes will be separated by 13 km line-of-sight and connected by optical fibers. To entangle these atoms, we will start with entangling the spin state of the atom with the polarization state of a photon at node 1. This entangled photon on absorption by the atom at node 2 changes the atomic state accordingly and leads to vacuum-stimulated emission of a herald photon. The emission of the herald photon will signal the successful entanglement of the two atoms. In this talk, I will present the progress of this project and give first estimates of the fidelity and possible entanglement generation rates. [1] Y. Zhou et al., arXiv:2308.08892 [2] M. Brekenfeld et al., Nat. Physics 16 647-651 (2020).
Keywords: Entanglement Distribution; Suburban; Atoms; Quantum Network Link; Quantum communication