Probing Dark Universe with Exceptional Points

Abstract

It is demonstrated that detection of putative particles such as paraphotons and axions constituting the dark sector of the universe can be reduced to detection of extremely weak links or couplings between cavities and modes. This method allows utilisation of extremely sensitive frequency metrology methods that are not limited by traditional requirements on ultra low temperatures, strong magnetic fields and sophisticated superconducting technology. We show that exceptional points in the eigenmode structure of coupled modes may be used to boost the sensitivity of dark matter mediated weak links. We find observables that are proportional to fractional powers of fundamental coupling constants. Particularly, in the case of axion detection, it is demonstrated that resonance frequency scaling with $\sim \sqrt{g_{a\gamma \gamma }\theta }$ and $\sim \sqrt[3]{g_{a\gamma \gamma }\theta }$ dependencies can be realised in a ternary photonic cavity system, which is beneficial as these coupling constants are extremely small.

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Cited by in corpus (6)

• Experimental observation of exceptional surface in synthetic dimensions with magnon polaritons
• Experimental Implementations of Cavity-Magnon Systems: from Ultra Strong Coupling to Applications in Precision Measurement
• Robustness of exceptional-point-based sensors against parametric noise: The role of Hamiltonian and Liouvillian degeneracies
• Probing ALPs and the Axiverse with Superconducting Radiofrequency Cavities
• Exceptional points in perturbed dielectric spheres: A resonant-state expansion study
• Observation of Perfect Absorption in Hyperfine Levels of Molecular Spins with Hermitian Subspaces