Demonstrating W-type entanglement of Dicke states in resonant cavity quantum electrodynamics

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).


Journal Article | Published
Author
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Abstract
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%.
Publishing Year
Date Published
2012-11-30
Journal Title
Physical Review A - Atomic, Molecular, and Optical Physics
Acknowledgement
This work was supported by the Swiss National Science Foundation (SNF) and the EU IP SOLID
Volume
86
Issue
5
IST-REx-ID

Cite this

Mlynek J, Abdumalikov A, Fink JM, et al. Demonstrating W-type entanglement of Dicke states in resonant cavity quantum electrodynamics. Physical Review A - Atomic, Molecular, and Optical Physics. 2012;86(5). doi:10.1103/PhysRevA.86.053838
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. Physical Review A - Atomic, Molecular, and Optical Physics, 86(5). https://doi.org/10.1103/PhysRevA.86.053838
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.” Physical Review A - Atomic, Molecular, and Optical Physics 86, no. 5 (2012). https://doi.org/10.1103/PhysRevA.86.053838.
J. Mlynek et al., “Demonstrating W-type entanglement of Dicke states in resonant cavity quantum electrodynamics,” Physical Review A - Atomic, Molecular, and Optical Physics, vol. 86, no. 5, 2012.
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).
Mlynek, Jonas, et al. “Demonstrating W-Type Entanglement of Dicke States in Resonant Cavity Quantum Electrodynamics.” Physical Review A - Atomic, Molecular, and Optical Physics, vol. 86, no. 5, American Physical Society, 2012, doi:10.1103/PhysRevA.86.053838.

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