10 papers
Extended Haloscope Search and Exclusion of a Candidate Signal near 1.036 GHz
Saebyeok Ahn, Boris I. Ivanov, Ohjoon Kwon +33
We report a follow-up axion haloscope search near 1.036 GHz that completes and extends our previous work [Phys. Rev. X 14, 031023 (2024)], in which a portion of the HEMT-based data…
Search for high-frequency gravitational waves via re-analysis of cavity axion data
Younggeun Kim, Jordan Gué, Changhao Xu +17
Monochromatic high-frequency gravitational waves (HFGW) provide a distinctive probe of new physics scenarios, most notably axion clouds around rotating black holes formed via super…
Broadband Kinetic-Inductance Parametric Amplifiers with Impedance Engineering
Chih-Chiao Hung, Hiroki Kutsuma, Chung Wai Sandbo Chang +2
Broadband quantum-limited parametric amplifiers (PAs) are essential components in quantum information science and technology. Impedance-engineered resonator-based PAs and traveling…
Josephson traveling-wave parametric amplifier based on low-intrinsic-loss coplanar lumped-element waveguide
C. W. Sandbo Chang, Arjan F. Van Loo, Chih-Chiao Hung +4
We present a Josephson traveling-wave parametric amplifier (JTWPA) based on a low-loss coplanar lumped-element waveguide architecture. By employing open-stub capacitors and Manhatt…
Probing KSVZ Axion Dark Matter near 5.9 GHz Using a 8-Cell Cavity Haloscope
Saebyeok Ahn, Caglar Kutlu, Soohyung Lee +9
We report on a search for axion dark matter in the frequency range near 5.9 GHz, conducted using the haloscope technique. The experiment employed an 8-cell microwave resonator desi…
Axion Dark Matter Search with Near-KSVZ Sensitivity Using the TM Mode
Sungjae Bae, Junu Jeong, Younggeun Kim +9
Dark matter remains one of the most profound mysteries in modern physics, with axions, a hypothetical particle proposed to resolve the strong CP problem, standing as a compelling c…