Ultralight dark matter, such as from dark photons or axion-like particles, can produce a coherent oscillating magnetic field signal at the Earth's surface, arising from the boundary conditions of the conductive Earth and the ionosphere. The Search for Non-Interacting Particles Experiment (SNIPE) Hunt collaboration utilizes a network of magnetometers placed in RF quiet locations to detect these...
We present the first experimental study of the “beehive” haloscope recently proposed in [https://arxiv.org/pdf/2404.06627]. Extending the haloscope detection technique toward the post-inflationary mass range ($>4$ GHz) suffers from the $d\nu/dt \propto \nu^{-6}$ scaling. The proposed array geometry evades the sensitivity degradation by employing an arbitrary number of overlapping cylindrical...
Axion-like particles (ALPs) arise from well-motivated extensions to the Standard Model and could account for dark matter. In the Milky Way, ALP dark matter constitutes a field oscillating at an as yet unknown frequency. We directly search for such particles through the nucleon interaction. We interfere the signals of two atomic K-3He comagnetometers situated in Mainz, Germany, and in Krakow,...
The search for ultralight boson dark matter and high-frequency gravitational waves has widely employed electromagnetic resonant detectors, such as cavities and LC circuits. This talk will highlight recent experimental advancements within the SHANHE Collaboration using superconducting radiofrequency (SRF) cavities for detecting dark photon dark matter and investigating galactic dark photons....
The Any Light Particle Search (ALPS II) expects an axion-photon reconversion rate of 1 photon per day, setting an upper limit for the required background in the foreseen Transition Edge Sensor (TES) based experiments. We present two distinct software and hardware based approaches contributing to achieving this goal: i) discriminating background events using state-of-the-art machine learning...
The Superconducting Quantum Materials and Systems Center, led by Fermi National Accelerator Laboratory, is one of five research centers funded by the U.S. Department of Energy as part of a national initiative to develop and deploy the world’s most powerful quantum computers and sensors. SQMS will also apply the same technologies used for quantum computing, such as SRF cavities and...
Compact objects such as neutron stars possess some of the strongest electric and magnetic fields in the observed universe. Non-thermal electromagnetic emission from neutron stars is sourced in regions with accelerating electric fields, $\vec{E} \cdot {\vec{B}} \ne 0$. These regions are also very efficient axion factories. Once produced, axions may (1) convert to photons, giving rise to...
We present the results of the search for dark photons using superconducting qubits based on the method which has been recently proposed (Moroi+, Phys. Rev. Lett.'23). Wave-like dark matter such as axions and dark photons can induce an electric field via the small kinetic mixing with ordinary photons. This electric field excites a superconducting qubit when it is in resonance. Thus, a...
A consequence of QCD axion dark matter being born after inflation is the emergence of ultra-small-scale substructures known as miniclusters. Although miniclusters merge to form minihalos, their intrinsic granularity is expected to remain imprinted on small scales in our galaxy. However, encounters with stars will tidally strip mass from the miniclusters, creating pc-long tidal streams that act...
Identifying the arrival direction of wavy dark matter is important after finding a signal of it. In particular, dish antenna experiments aim to detect sharp radio signals converted from dark photon or axion at the boundary of the electromagnetic field, e.g., metal plate converter. We expect to understand the mass and coupling constants of the wavy dark matter when we find the conversion radio...
Dark photon is one of the candidates for cold dark matter, predicted by a part of string theories and high-scale inflation models. Dark photons interact with ordinary photons via tiny kinetic mixing with them. Owing to this interaction, the dark photons convert into millimeter-wave light at the electromagnetic boundaries, such as the surface of a metal plate. The frequency of the conversion...
The RADES collaboration has been exploring different haloscope designs to improve the sensitivity to relic axions in certain masses. From multicavities, to increase volume at higher frequencies, to superconducting tapes, to achieve high quality factors, several technologies are being tested in order to increase the reach of conventional haloscope strategies.
One of the most promising...
Several ideas are proposed utilizing superconducting qubits in dark photon searches such as the single photon counter, direct excitation, and cavity tuning with superconducting qubits. Here, we introduce activities to operate qubits in a strong magnetic field to expand these dark photon searches to axion searches. In particular, we discuss our strategy to tolerate a strong magnetic field from...
In the quest to improve the analysis procedure for dark matter (DM) axion searches in haloscope experiments, we propose integrating deep learning (DL) techniques into the current methodology. Specifically, as a first step towards full DL integration in the procedure, we aim to show the well-known Savitzky-Golay filter used for spectral shape removal can be replaced by a deep convolutional...
