Erlangen 2018 – scientific programme

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A: Fachverband Atomphysik

A 41: Poster Session IIIa

A 41.3: Poster

Thursday, March 8, 2018, 16:15–18:15, Orangerie

Towards non-destructive, real-time tranport measurements of interacting fermions — •Hideki Konishi, Kevin E. Roux, Barbara Cilenti, and Jean-Philippe Brantut — Institute of Physics, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

In recent years, it has become possible to investigate transport phenomena using cold atoms. Previous researches have realized the Landauer setup [1] and a quantum point contact [2] and observed quantized conductance [3] emerging in mesoscopic systems.

Since the detection method implied so far the destructive observation of atom number densities, measurements relied on comparing different samples. This makes the measurements sensitive to even very weak fluctuations in the atomic sample preparation. In order to achieve more precise measurements, we plan to implement quantum non-demolition measurements of the atomic current featuring cavity quantum electrodynamics for fermionic lithium-6 with a high-finesse optical cavity. We will continuously monitor either the change of atom numbers in one of the terminal resorvoirs or motions of atoms within mesoscopic transport channels [4] by phase sensitive detection of the cavity field. In the poster we will detail the non-destructive probing scheme and present the design of the experimental apparatus and the current status of the experiment.

[1] J.-P. Brantut et al., Science 337, 1069 (2012). [2] D. Husmann et al., Science 350, 1498 (2015). [3] S. Krinner et al., Nature 517, 64 (2015). [4] C. Laflamme et al., Phys. Rev. A 95, 043843 (2017).