Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology

Q 16.40: Poster

Montag, 17. März 2014, 16:30–18:30, Spree-Palais

Towards the simulation of the spin-boson model — •Jakob Pacer, Govinda Clos, Ulrich Warring und Tobias Schaetz — Physikalisches Institut, Universität Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany

In our trapped-ion experiment, we aim to study the onset of the dynamics of the spin-boson model [1], a paradigmatic open-quantum system. We consider a linear chain of Mg⁺ ions, their internal structure (two hyperfine ground states) representing a spin system while the motional modes stand for the bosons.

Different lasers and control protocols [2] can be used to explore the rich physics of the spin-boson model. In particular, two-photon stimulated Raman transitions enable coherent couplings between the hyperfine states as well as common motional modes of the ions. In our presentation, we will report about crucial techniques for our studies, including: isotope-selective loading, ion-chain reordering, and sympathetic cooling towards the ground state of motion.

[1] Porras, D., Marquardt, F., von Delft, J. and Cirac, J. I., Phys. Rev. A 78, 010101 (2008). [2] A. Friedenauer, H. Schmitz, J. Glueckert, D. Porras and T. Schaetz, Nat. Phys. 4, 757-761 (2008).