Scalable Creation of Long-Lived Multipartite Entanglement
Kaufmann H, Ruster T, Schmiegelow CT, Luda MA, Kaushal V, Schulz J, Von Lindenfels D, Schmidt-Kaler F, Poschinger UG (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 119
Article Number: 150503
Journal Issue: 15
DOI: 10.1103/PhysRevLett.119.150503
Abstract
We demonstrate the deterministic generation of multipartite entanglement based on scalable methods. Four qubits are encoded in Ca+40, stored in a microstructured segmented Paul trap. These qubits are sequentially entangled by laser-driven pairwise gate operations. Between these, the qubit register is dynamically reconfigured via ion shuttling operations, where ion crystals are separated and merged, and ions are moved in and out of a fixed laser interaction zone. A sequence consisting of three pairwise entangling gates yields a four-ion Greenberger-Horne-Zeilinger state |ψ=(1/2)(|0000+|1111), and full quantum state tomography reveals a state fidelity of 94.4(3)%. We analyze the decoherence of this state and employ dynamic decoupling on the spatially distributed constituents to maintain 69(5)% coherence at a storage time of 1.1 sec.
Involved external institutions
Germany (DE)How to cite
APA:
Kaufmann, H., Ruster, T., Schmiegelow, C.T., Luda, M.A., Kaushal, V., Schulz, J.,... Poschinger, U.G. (2017). Scalable Creation of Long-Lived Multipartite Entanglement. Physical Review Letters, 119(15). https://dx.doi.org/10.1103/PhysRevLett.119.150503
MLA:
Kaufmann, H., et al. "Scalable Creation of Long-Lived Multipartite Entanglement." Physical Review Letters 119.15 (2017).
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