Realizing a deterministic source of multipartite-entangled photonic qubits

Besse JC, Reuer K, Collodo MC, Wulff A, Wernli L, Copetudo A, Malz D, Magnard P, Akin A, Gabureac M, Norris GJ, Cirac JI, Wallraff A, Eichler C (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Nature Communications Nature Publishing Group: Nature Communications

Book Volume: 11

Article Number: 4877

Journal Issue: 1

DOI: 10.1038/s41467-020-18635-x

Abstract

Sources of entangled electromagnetic radiation are a cornerstone in quantum information processing and offer unique opportunities for the study of quantum many-body physics in a controlled experimental setting. Generation of multi-mode entangled states of radiation with a large entanglement length, that is neither probabilistic nor restricted to generate specific types of states, remains challenging. Here, we demonstrate the fully deterministic generation of purely photonic entangled states such as the cluster, GHZ, and W state by sequentially emitting microwave photons from a controlled auxiliary system into a waveguide. We tomographically reconstruct the entire quantum many-body state for up to N = 4 photonic modes and infer the quantum state for even larger N from process tomography. We estimate that localizable entanglement persists over a distance of approximately ten photonic qubits.

Authors with CRIS profile

Christopher Eichler

Involved external institutions

Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich CH Switzerland (CH) Max-Planck-Institute of Quantum Optics (MPQ) / Max-Planck-Institut für Quantenoptik DE Germany (DE)

How to cite

APA:

Besse, J.-C., Reuer, K., Collodo, M.C., Wulff, A., Wernli, L., Copetudo, A.,... Eichler, C. (2020). Realizing a deterministic source of multipartite-entangled photonic qubits. Nature Communications, 11(1). https://doi.org/10.1038/s41467-020-18635-x

MLA:

Besse, Jean-Claude, et al. "Realizing a deterministic source of multipartite-entangled photonic qubits." Nature Communications 11.1 (2020).

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