Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 28: Ultra-cold Atoms, Ions and BEC II (joint session A/Q)
A 28.6: Vortrag
Donnerstag, 14. März 2024, 12:15–12:30, HS 1098
Phase-Stable Traveling Waves Stroboscopically Matched for Super-Resolved Observation of Trapped-Ion Dynamics — •Florian Hasse, Deviprasath Palani, Apurba Das, Frederike Doerr, Leon Goepfert, Ole Pikkemaat, Ulrich Warring, and Tobias Schaetz — Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
We introduce an approach, creating and maintaining the coherence of four oscillators: a global microwave reference field, a polarization-gradient traveling-wave pattern of light, and the spin and motional states of a single trapped ion. The features of our method are showcased by probing the 140-nm periodic light pattern and stroboscopically tracing dynamical variations in position and momentum observables with noise floors of 1.8(2) nm and 8(2) zµNs, respectively.
We are currently expanding our methods towards non-classical squeezed states to realize the transfer of spatial entanglements, present in multimode squeezed states, into the robust electronic degrees of freedom (DOF) of multiple ions. For this we switch the trapping potential of two 25Mg+ ions fast enough to induce a non-adiabatic change of the ions’ motional mode frequencies, preparing the ions in a squeezed state of motion, accompanied by the formation of entanglement in the ions’ motional DOF. This is a promising ansatz to study analogs of physics of the early universe, as particle pair creation during cosmic inflation, and relativistic quantum effects, e.g., Hawking radiation.
A summary of our previous work is published on Arxiv: https://arxiv.org/abs/2309.15580
Keywords: Super-Resolution; Phase-Stable Combination of MW and TPSR beams; Running Wave Pattern; Polarization-Gradient Traveling-Wave Pattern; Stroboscopically Tracing Dynamics in Phase-Space