%0 Journal Article
%A Omran, A.
%A Levine, H.
%A Keesling, A.
%A Semeghini, G.
%A Wang, T. T.
%A Ebadi, S.
%A Bernien, H.
%A Zibrov, A. S.
%A Pichler, H.
%A Choi, S.
%A Jian, Cui
%A Rossignolo, M.
%A Rembold, Phila
%A Montangero, S.
%A Calarco, Tommaso
%A Endres, M.
%A Greiner, M.
%A Vuletić, V.
%A Lukin, M. D.
%T Generation and manipulation of Schrödinger cat states in Rydberg atom arrays
%J Science
%V 365
%N 6453
%@ 0036-8075
%C Washington DC
%I American Association for the Advancement of Science
%M FZJ-2019-04193
%P 570 - 574
%D 2019
%X Quantum entanglement involving coherent superpositions of macroscopically distinct states is among the most striking features of quantum theory, but its realization is challenging because such states are extremely fragile. Using a programmable quantum simulator based on neutral atom arrays with interactions mediated by Rydberg states, we demonstrate the creation of “Schrödinger cat” states of the Greenberger-Horne-Zeilinger (GHZ) type with up to 20 qubits. Our approach is based on engineering the energy spectrum and using optimal control of the many-body system. We further demonstrate entanglement manipulation by using GHZ states to distribute entanglement to distant sites in the array, establishing important ingredients for quantum information processing and quantum metrology.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:31395778
%U <Go to ISI:>//WOS:000483195200035
%R 10.1126/science.aax9743
%U https://juser.fz-juelich.de/record/864401