Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 49: Quantum Effects: Cavity QED I

Q 49.5: Talk

Thursday, March 26, 2015, 12:15–12:30, B/gHS

Ion trap cavity QED experiments at Sussex — •Hiroki Takahashi, Stephen Begley, Markus Vogt, Ezra Kassa, Jack Morphew, Sahar Hejazi, and Matthias Keller — University of Sussex, Department of Physics and Astronomy, Pevensey 2, Falmer, Brighton East Sussex, United Kingdom BN1 9QH

We are currently working on three distinct ion-cavity QED experiments. In one of them, a cavity collinear to the axis of a linear Paul trap is employed where a moderate ion-photon coupling is expected. The simultaneous couplings of multiple ions to the same cavity mode can be exploited, for example, for probabilistic generation of entanglement. A stronger coupling can be achieved by using a miniature fibre cavity. We have developed a novel endcap-type ion trap which tightly integrates a high finesse fibre cavity inside the electrodes [1]. With strong ion-photon coupling, a deterministic transfer of quantum states between ions and photons becomes possible. Finally, the third trap combines the benefits of the former two by employing a miniature linear trap with a fibre cavity collinear to the trap axis. This configuration allows us to strongly couple single ions in a linear string simultaneously to the cavity mode. This system can be used for ion-photon interface with collectively enhanced coupling and cavity cooling of molecular ions. We will present an overview of these three on-going experiments and their future prospects.

[1] H. Takahashi et al. , New. J. Phys. 15, 053011 (2013)