TY  - JOUR
AU  - Omran, A.
AU  - Levine, H.
AU  - Keesling, A.
AU  - Semeghini, G.
AU  - Wang, T. T.
AU  - Ebadi, S.
AU  - Bernien, H.
AU  - Zibrov, A. S.
AU  - Pichler, H.
AU  - Choi, S.
AU  - Jian, Cui
AU  - Rossignolo, M.
AU  - Rembold, Phila
AU  - Montangero, S.
AU  - Calarco, Tommaso
AU  - Endres, M.
AU  - Greiner, M.
AU  - Vuletić, V.
AU  - Lukin, M. D.
TI  - Generation and manipulation of Schrödinger cat states in Rydberg atom arrays
JO  - Science
VL  - 365
IS  - 6453
SN  - 0036-8075
CY  - Washington DC
PB  - American Association for the Advancement of Science
M1  - FZJ-2019-04193
SP  - 570 - 574
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:31395778
UR  - <Go to ISI:>//WOS:000483195200035
DO  - DOI:10.1126/science.aax9743
UR  - https://juser.fz-juelich.de/record/864401
ER  -