Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 63: Cold atoms VII - micromachines (joint session A/Q)

Q 63.5: Vortrag

Freitag, 9. März 2018, 11:35–11:50, K 0.011

Probing quantum dynamical pair correlation functions — •Salvatore Castrignano and Jörg Evers — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

The space-time correlations among particles in e.g. condensed matter systems can be experimentally studied via the so-called Time Domain Interferometry proposed in [1]. In particular the dynamical couple correlation function [2] can be obtained from the recorded interferogram. This scheme has sofar been theoretically studied and successfully tested for target systems whose dynamics can be safely described by classical mechanics.

With the growth of interest toward higly correlated quantum materials, the development of experimental techniques for measuring quantum dynamical correlations is getting more and more interest. In this project we then ask if extensions of the above interferometric setup are capable of accessing the quantum dynamical couple-correlation function of a quantum target. The classical and quantum correlations have different properties and through a theoretical analysis of the setup in a full quantum framework it is shown that these differences are experimentally accessible. Moreover, using elements of measurement theory in classical and quantum frameworks [3], we give a heuristic criterion to understand when to expect quantum or classical behaviour of generic correlation functions.

[1] A. Q. R. Baron et al., Phys. Rev. Lett. 79, 2823 (1997)

[2] L. Van Hove, Phys. Rev. 95, 249 (1954)

[3] P. Uhrich et al., Phys. Rev. A 96, 022127 (2017)