Mainz 2017 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 53: Poster: Quantum Optics and Photonics III
Q 53.33: Poster
Thursday, March 9, 2017, 17:00–19:00, P OG2
Second-order correlation analysis for single particle interferometry with applications in sensor technologies — •Robin Röpke1, Alexander Rembold1, Georg Schütz1, Andreas Günther2, and Alexander Stibor1 — 1University of Tübingen, Physical Institute, Quantum Electron - & Ion - Interferometry — 2University of Tübingen, Physical Institute, Nano Atomoptics
The high phase sensitivity of single particle interferometers makes them susceptible to dephasing perturbations such as mechanical vibrations and electromagnetic oscillations. They can decrease the spatial information and wash-out the interference pattern, leading to a loss of contrast. This is a problem for precision phase measurements especially the perturbing environment can never be perfectly shielded. We demonstrate a method to identify and correct multiple perturbation frequencies with different amplitudes by using spatial and temporal correlations. With a delay line detector we get the spatial and temporal information in a high resolution. This allows a correlation data analysis that significantly reduces the effects of dephasing and allows the reconstruction of the original spatial fringe pattern. We provide a full theoretical description based on second-order correlation theory combined with Fourier analysis. The theory is applied on measurement data from an electron interferometer that has been vibrationally disturbed and electromagnetically dephased by multiple simultaneous oscillations. We demonstrate that our method can extract unknown perturbation frequencies from a washed-out interference pattern which can be applied in sensor technology to analyze external frequencies.