Abstract
Cavity quantum electrodynamics (cavity QED) is the study of the strong coupling between two-level emitters and high-Q optical cavities, where the quantum nature of the light plays a crucial role. Thus far, the relevant cavity QED experiments have been performed by using various particles, including neutral atoms, trapped ions, quantum dots, and nitrogen–vacancy centers. Here, we focus on the cavity QED with the molecules placed inside or close to a microcavity. The molecules have the complex energy structures and the short energy-level lifetimes, posing the experimental challenges. Nevertheless, the strong molecule–cavity coupling regime is still accessible by carefully designing the cavity structure and controlling the ambient environment. The strong emitter–cavity coupling does not only shorten the measurement time in quantum metrology but also enhances the sensitivity of a sensor. The fundamental limit of the measurement uncertainty is set by the Heisenberg uncertainty principle.
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Notes
- 1.
In some literatures, a factor 1/3 is introduced to account for a randomly oriented dipole moment.
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Vollmer, F., Yu, D. (2022). Molecular Cavity QED. In: Optical Whispering Gallery Modes for Biosensing. Springer, Cham. https://doi.org/10.1007/978-3-031-06858-4_7
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