Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 1: Quantum Optics I

Q 1.6: Talk

Monday, March 23, 2015, 12:45–13:00, C/HSO

Experimentally investigating the frequency dependence of the scattering phase in a spontaneous Raman process — •Philipp Müller, Pascal Eich, Michael Schug, Christoph Kurz, and Jürgen Eschner — Experimentalphysik, Universität des Saarlandes, Saarbrücken, Germany

Controlled photon-to-atom quantum state transfer is essential for atom-based quantum networks, a crucial prerequisite being the complete control over the quantum-mechanical phase of the atom–photon system [1].

We implement our experimental protocol for heralded photon-to-atom quantum state transfer [2] using a single trapped calcium-40 ion and laser photons. To investigate the effect of the frequency spectrum of the absorbed photon on the atomic state, we analyze the phase of the final atomic superposition revealing the phase difference of the complex absorption profiles of the two involved Raman transitions. The experimental results are compared with results of numerical simulations.

[1] M. Schug et al., Phys. Rev. A 90, 023829 (2014)

[2] C. Kurz et al., Nat. Commun. 5, 5527 (2014)