Axion and axion-like particles are hypothesized to interact with photons, inducing a time-varying
rotation in the polarization of linearly polarized laser light. This work presents a highly sensitive
apparatus designed to detect this rotation. The setup employs a polarimetry configuration featuring
two quarter-wave plates inside a Fabry-P´erot cavity, allowing us to investigate unexplored...
Dark matter candidates such as axions and dark photons can generate coherent, oscillating magnetic fields at the Earth’s surface, arising from boundary conditions between the conductive Earth and the ionosphere. The Search for Non-Interacting Particles Experiment (SNIPE) collaboration employs a global network of magnetometers in radio-quiet locations to search for these signals. An update on...
According to the ΛCDM model, spectral distortions of the CMB from a perfect blackbody shape are expected. The COBE experiment was the first to measure the absolute spectrum of the CMB in the 1 to 95 cm⁻¹ frequency range, but it did not detect any deviations from a pure blackbody. Absolute measurements of the CMB at longer wavelengths than those covered by COBE have been performed by a few...
Conventional closed resonator haloscopes become increasingly ineffective at probing axion masses above $\sim 40 \mathrm{\mu eV} $, as their effective volume scales as $V_\mathrm{eff} \propto 1/m_a^{3}$, leading to a steep decline in signal power with increasing mass. Open resonators, in contrast, relax the transverse boundary conditions, resulting in a more favorable scaling of $V_\mathrm{eff}...
