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Q: Fachverband Quantenoptik und Photonik

Q 34: Quantum Effects: Entanglement and Decoherence

Q 34.7: Vortrag

Mittwoch, 8. März 2017, 16:15–16:30, P 4

Experimental observation of non-Markovianity in a trapped-ion quantum system — •Matthias Wittemer, Govinda Clos, Ulrich Warring, Heinz-Peter Breuer, and Tobias Schaetz — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg

Any realistic quantum system interacts with its environment. Thereby, the open system builds up entanglement and correlations with the environment and exchanges information. Trapped ions offer a high level of control of internal and external degrees of freedom and are well-suited to engineer closed and open quantum systems. This enables systematic studies of entanglement, decoherence, and thermalization in quantum systems of variable complexity [1]. With our trapped-ion system we experimentally study the flow of information in a closed quantum system between a subsystem and its environment and characterize associated memory effects [2]. We prepare different environmental states and realize different interactions between system and environment to measure the non-Markovianity as a function of these parameters.

[1] G. Clos et al., Phys. Rev. Lett. 117, 170401 (2016)

[2] H.-P. Breuer et al., Phys. Rev. Lett. 103, 210401 (2009)