Physical Review Letters
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Quantum Metrology in the Ultrastrong Coupling Regime of Light-Matter Interactions: Leveraging Virtual Excitations without Extracting Them
Author(s): Christoph Hotter, Adam Miranowicz, and Karol Gietka
Virtual excitations, inherent to ultrastrongly coupled light-matter systems, induce measurable modifications in system properties, offering a novel resource for quantum technologies. In this Letter, we demonstrate how these virtual excitations and their correlations can be harnessed to enhance preci… [Phys. Rev. Lett. 135, 100802] Published Thu Sep 04, 2025
