Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 50: Quantum information: Concepts and methods III
Q 50.2: Vortrag
Donnerstag, 20. März 2014, 16:45–17:00, Kinosaal
Lieb-Robinson Bounds for Spin-Boson Lattice Models and Trapped Ions — •Johannes Jünemann1,2,3, Andrea Cadarso2,4, David Pérez-García4, Alejandro Bermudez2, and Juan-José García-Ripoll2 — 1Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55099 Mainz, Germany — 2Instituto de Física Fundamental IFF-CSIC, Calle Serrano 113b, Madrid E-28006, Spain — 3Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — 4Facultad de Matemáticas, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid E-28040, Spain
We derive a Lieb-Robinson bound for the propagation of spin correlations in a model of spins interacting through a bosonic lattice field, which satisfies a Lieb-Robinson bound in the absence of spin-boson couplings. We apply these bounds to a system of trapped ions and find that the propagation of spin correlations, as mediated by the phonons of the ion crystal, can be faster than the regimes currently explored in experiments. We propose a scheme to test the bounds by measuring retarded correlation functions via the crystal fluorescence.
[1] Phys. Rev. Lett. 111, 230404 (2013)