Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 24: Quantum Effects: Entanglement and Decoherence III
Q 24.4: Vortrag
Dienstag, 24. März 2015, 15:15–15:30, B/gHS
Single-photon and macroscopical entanglement using nuclear ensembles — Wen-Te Liao1,2,3, Christoph H. Keitel1, and •Adriana Pálffy1 — 1Max Planck Institute for Nuclear Physics, Heidelberg, Germany — 2Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — 3Center for Free Electron Laser Science, Hamburg, Germany
Recent developments of x-ray optics lay the foundation for controlling the quantum behavior of single x-ray photons, possibly by exploiting suitable resonant nuclear transitions. Here we propose a setup that actively manipulates the scattering channels of single x-ray quanta in nuclear forward scattering to create a nuclear polariton which propagates in two opposite directions in a 57Fe sample [1]. The two counter-propagating polariton branches are entangled by a single x-ray photon and create a sub-Ångstrom wavelength standing wave excitation pattern that can be used as a flexible tool to dynamically probe matter on the atomic scale. As a second aspect we show that by combining an x-ray parametric down-conversion source and x-ray interferometry with nuclear resonant scattering techniques, two macroscopic crystals hosting Mössbauer nuclei located each on an interferometer arm can be entangled [2]. The coherence time of the entanglement state can be prolonged up to approx. 100 nanoseconds, opening new avenues for studies of the boundary between the quantum and classical worlds.
[1] W.-T. Liao, C. H. Keitel and A. Pálffy, Phys. Rev. Lett. 112, 057401 (2014).
[2] W.-T. Liao, C. H. Keitel and A. Pálffy, arXiv:1407.3292 (2014).