6533b85afe1ef96bd12b9790

RESEARCH PRODUCT

Scalable Creation of Long-Lived Multipartite Entanglement.

D. Von LindenfelsH. KaufmannT. RusterV. KaushalJuan Sebastián SchulzFerdinand Schmidt-kalerUlrich PoschingerMarcelo Alejandro LudaChristian Tomás Schmiegelow

subject

Computer scienceCiencias Físicasmedia_common.quotation_subjectGeneral Physics and AstronomyFidelityFOS: Physical sciencesData_CODINGANDINFORMATIONTHEORY02 engineering and technologySquashed entanglement01 natural sciencesMultipartite entanglement//purl.org/becyt/ford/1 [https]Computer Science::Emerging TechnologiesQuantum mechanics0103 physical sciencesComputación Cuántica010306 general physicsmedia_commonQuantum PhysicsTheoryofComputation_GENERAL//purl.org/becyt/ford/1.3 [https]Quantum Physics021001 nanoscience & nanotechnologyIones FríosAstronomíaScalabilityIon trapW state0210 nano-technologyQuantum Physics (quant-ph)CIENCIAS NATURALES Y EXACTAS

description

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. Fil: Kaufmann, H.. University Mainz. Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg; Alemania Fil: Ruster, T.. University Mainz. Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg; Alemania Fil: Schmiegelow, Christian Tomás. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina Fil: Luda, Marcelo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina Fil: Kaushal, V.. University Mainz. Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg; Alemania Fil: Schulz, Juan Sebastián. University Mainz. Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg; Alemania Fil: Von Lindenfels, D.. University Mainz. Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg; Alemania Fil: Schmidt-Kaler, F.. University Mainz. Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg; Alemania Fil: Poschinger, U. G.. University Mainz. Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg; Alemania

yearjournalcountryeditionlanguage
2017-10-01Physical review letters
10.1103/physrevlett.119.150503https://pubmed.ncbi.nlm.nih.gov/29077443