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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster I

Q 35.29: Poster

Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof

Simulating the spin-boson model in a Paul trap — •Govinda Clos, Martin Enderlein, Ulrich Warring, and Tobias Schaetz — Physikalisches Institut, Universität Freiburg, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany

Employing a linear chain of several Mg-25 ions stored in a Paul trap, we aim to experimentally simulate the dynamics of the spin-boson model. Using different lasers and control protocols we can, e.g., cool the ions to the motional ground state (n<0.03) and manipulate their internal and external degrees of freedom. Two-photon stimulated Raman transitions enable coherent couplings between the hyperfine states of one ion (the simulated spin) and the set of axial vibrational modes of all ions in the chain. These modes represent a finite number of harmonic oscillators (the bosons).

Following a proposal by Porras et al. [1] and based on the simulations realized by Friedenauer et al. [2], our setup based on trapped ions and of finite size will permit to explore the different regimes of the model depending on the spectral density of the environment: (i) revivals of excitation and entanglement, (ii) the overdamped regime, and finally, (iii) localization, i.e., inhibition of spin/energy transfer due to the Quantum Zeno effect.

[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).