SAMOP 2023 – scientific programme
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A: Fachverband Atomphysik
A 20: Poster II
A 20.16: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
Towards entanglement transfer from external to internal degrees of freedom and holography of laser wave — •Florian Hasse, Deviprasath Palani, Apurba Das, Maharshi Pran Bora, Lucas Eisenhart, Tobias Spanke, Ulrich Warring, and Tobias Schaetz — Physikalisches Institut, University of Freiburg
Trapped ions present a promising platform for quantum simulations [1]. In our linear Paul trap, we switch the trapping potential of two 25Mg+ ions fast enough to induce a non-adiabatic change of the ions’ motional mode frequencies. Thereby, we prepare ions in a squeezed state of motion. This process is accompanied by the formation of entanglement in the ions’ motional degree of freedom and can be interpreted as an experimental analogue to the particle pair creation during cosmic inflation in the early universe [2].
We aim at transferring this entanglement from the external to the internal degree of freedom. To improve the measured contrast, we established a phase coherent combination of our laser- and microwave fields. As benchmarking experiments, we reconstruct holographs of our laser light wave. Here we use Ramsey sequences consisting of two π/2 pulses, where the second pulse is stroboscopically measured. Additionally, we aim at squeezing the ion(s) wave function to further enhance contrast.
[1] T. Schaetz et al., New J. Phys. 15, 085009 (2013).
[2] M. Wittemer et al., Phys. Rev. Lett. 123, 180502 (2019).