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SUMMARY:Yannis Semertzidis(IBS CAPP) "Quantum-Limited Searches for High-Fr
 equency Axion Dark Matter: CARAMEL and the Grenoble Initiative"
DTSTART:20260804T070000Z
DTEND:20260804T080000Z
DTSTAMP:20260814T011000Z
UID:indico-event-1378@indico.ibs.re.kr
DESCRIPTION:Axions are compelling dark-matter candidates\, but searches at
  higher axion masses—and therefore higher microwave frequencies—become
  increasingly difficult. Conventional resonant cavities lose effective vol
 ume as the frequency increases\, while quantum noise places progressively 
 stricter demands on the receiver. New experimental concepts are therefore 
 required to extend sensitive searches into the largely unexplored region a
 bove 10 GHz.\nIn this talk\, I will present CARAMEL\, a coherent detection
  approach designed to provide quantum-noise-limited sensitivity over a com
 paratively broad bandwidth. I will discuss its operating principles\, expe
 cted performance\, and potential advantages for high-frequency axion searc
 hes. I will then describe a new European-centered experimental initiative 
 based in Grenoble that aims to combine CARAMEL with large-volume\, high-fi
 eld magnets and complementary detector geometries. The proposed program in
 cludes arrays of high-quality-factor resonators for the 10–30 GHz region
  and scalable antenna and dielectric structures for extending the search t
 oward 30–100 GHz. The scientific reach\, principal technical challenges\
 , and opportunities for collaboration will also be discussed.\n\nhttps://i
 ndico.ibs.re.kr/event/1378/
LOCATION:Room B447-1 (Theory Bldg\, 4F)
URL:https://indico.ibs.re.kr/event/1378/
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