Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 20: Atom & Ion Clocks and Metrology I

Q 20.6: Vortrag

Dienstag, 11. März 2025, 12:30–12:45, HS Botanik

Photon recoil spectroscopy enhanced by squeezing and statistical tests. — •Ivan Vybornyi and Klemens Hammerer — Institut für theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany

In photon recoil spectroscopy, internal transitions of atoms or molecules are identified from the recoil and the resulting motional displacement caused by an applied light field of variable frequency. A notable example of this "needle in a haystack" problem is the search for narrow clock transitions in highly charged ions, as recently discussed in [Phys. Rev. Applied 22, 054059]. A key challenge is to increase the scan speed over a frequency bandwidth by enhancing the sensitivity of displacement detection. In this work, we explore two complementary improvements: the use of squeezed motional states and optimal statistical postprocessing of data within a hypothesis testing framework. We demonstrate that each method independently provides a substantial boost to scan speed, while their combination effectively mitigates state preparation and measurement errors, fully leveraging the quantum enhancement offered by squeezing.

Keywords: trapped ions; clocks; highly-charged ions; narrow transitions; squeeezing