{"date_created":"2018-12-11T11:53:59Z","_id":"1783","oa":1,"abstract":[{"lang":"eng","text":"Nonlinearity and entanglement are two important properties by which physical systems can be identified as nonclassical. We study the dynamics of the resonant interaction of up to N=3 two-level systems and a single mode of the electromagnetic field sharing a single excitation dynamically. We observe coherent vacuum Rabi oscillations and their nonlinear √N speedup by tracking the populations of all qubits and the resonator in time. We use quantum state tomography to show explicitly that the dynamics generates maximally entangled states of the W class in a time limited only by the collective interaction rate. We use an entanglement witness and the 3-tangle to characterize the state whose fidelity F=78% is limited in our experiments by crosstalk arising during the simultaneous qubit manipulations which is absent in a sequential approach with F=91%."}],"day":"30","author":[{"last_name":"Mlynek","full_name":"Mlynek, Jonas A","first_name":"Jonas"},{"first_name":"Abdufarrukh","last_name":"Abdumalikov","full_name":"Abdumalikov, Abdufarrukh A"},{"full_name":"Johannes Fink","orcid":"0000-0001-8112-028X","last_name":"Fink","first_name":"Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Steffen","full_name":"Steffen, L. Kraig","first_name":"L."},{"first_name":"Matthias","last_name":"Baur","full_name":"Baur, Matthias P"},{"first_name":"C","full_name":"Lang, C","last_name":"Lang"},{"first_name":"Arjan","last_name":"Van Loo","full_name":"Van Loo, Arjan F"},{"full_name":"Wallraff, Andreas","last_name":"Wallraff","first_name":"Andreas"}],"quality_controlled":0,"publisher":"American Physical Society","intvolume":"        86","month":"11","doi":"10.1103/PhysRevA.86.053838","title":"Demonstrating W-type entanglement of Dicke states in resonant cavity quantum electrodynamics","date_updated":"2021-01-12T06:53:10Z","publication_status":"published","status":"public","issue":"5","extern":1,"year":"2012","acknowledgement":"This work was supported by the Swiss National Science Foundation (SNF) and the EU IP SOLID","date_published":"2012-11-30T00:00:00Z","citation":{"apa":"Mlynek, J., Abdumalikov, A., Fink, J. M., Steffen, L., Baur, M., Lang, C., … Wallraff, A. (2012). Demonstrating W-type entanglement of Dicke states in resonant cavity quantum electrodynamics. <i>Physical Review A - Atomic, Molecular, and Optical Physics</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.86.053838\">https://doi.org/10.1103/PhysRevA.86.053838</a>","ista":"Mlynek J, Abdumalikov A, Fink JM, Steffen L, Baur M, Lang C, Van Loo A, Wallraff A. 2012. Demonstrating W-type entanglement of Dicke states in resonant cavity quantum electrodynamics. Physical Review A - Atomic, Molecular, and Optical Physics. 86(5).","ama":"Mlynek J, Abdumalikov A, Fink JM, et al. Demonstrating W-type entanglement of Dicke states in resonant cavity quantum electrodynamics. <i>Physical Review A - Atomic, Molecular, and Optical Physics</i>. 2012;86(5). doi:<a href=\"https://doi.org/10.1103/PhysRevA.86.053838\">10.1103/PhysRevA.86.053838</a>","mla":"Mlynek, Jonas, et al. “Demonstrating W-Type Entanglement of Dicke States in Resonant Cavity Quantum Electrodynamics.” <i>Physical Review A - Atomic, Molecular, and Optical Physics</i>, vol. 86, no. 5, American Physical Society, 2012, doi:<a href=\"https://doi.org/10.1103/PhysRevA.86.053838\">10.1103/PhysRevA.86.053838</a>.","short":"J. Mlynek, A. Abdumalikov, J.M. Fink, L. Steffen, M. Baur, C. Lang, A. Van Loo, A. Wallraff, Physical Review A - Atomic, Molecular, and Optical Physics 86 (2012).","ieee":"J. Mlynek <i>et al.</i>, “Demonstrating W-type entanglement of Dicke states in resonant cavity quantum electrodynamics,” <i>Physical Review A - Atomic, Molecular, and Optical Physics</i>, vol. 86, no. 5. American Physical Society, 2012.","chicago":"Mlynek, Jonas, Abdufarrukh Abdumalikov, Johannes M Fink, L. Steffen, Matthias Baur, C Lang, Arjan Van Loo, and Andreas Wallraff. “Demonstrating W-Type Entanglement of Dicke States in Resonant Cavity Quantum Electrodynamics.” <i>Physical Review A - Atomic, Molecular, and Optical Physics</i>. American Physical Society, 2012. <a href=\"https://doi.org/10.1103/PhysRevA.86.053838\">https://doi.org/10.1103/PhysRevA.86.053838</a>."},"main_file_link":[{"open_access":"1","url":"http://arxiv.org/abs/1202.5191"}],"volume":86,"publist_id":"5332","publication":"Physical Review A - Atomic, Molecular, and Optical Physics","type":"journal_article"}