BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Heterodyne Detection of Axion Dark Matter & Quantum and Classical 
 Effects of Axion Dark Matter
DTSTART:20260709T070000Z
DTEND:20260709T083000Z
DTSTAMP:20260727T171900Z
UID:indico-event-1372@indico.ibs.re.kr
DESCRIPTION:Speakers: Kevin Zhou (UC Berkeley)\n\n"Heterodyne Detection of
  Axion Dark Matter"\nThough most axion dark matter experiments use static 
 background fields\, the axion also induces transitions between oscillating
  modes of an excited cavity. This "heterodyne" detection approach benefits
  from the very high quality factors available in superconducting cavities\
 , and has a parametrically enhanced signal power at low axion masses. I wi
 ll review recent experimental progress on this concept\, which is currentl
 y being pursued by groups at SLAC\, Fermilab\, DESY\, CERN\, and Peking. I
 n addition\, I will show that the heterodyne approach is the strongest met
 hod to search for the coupling of ultralight axial vector dark matter to p
 hotons.\n \n"Quantum and Classical Effects of Axion Dark Matter"\nThe sea
 rch for axion dark matter is rapidly expanding\, with new experiments depl
 oying quantum sensing techniques to reach unprecedented precision. But doe
 s one need to account for the quantum nature of the axion itself? Using co
 ncepts developed in quantum optics\, I will show that the axion can easily
  evolve into a quantum state with no classical analogue. But the intrinsic
 ally quantum effects of these states are practically undetectable: there a
 lways exists a classical ensemble which gives the same detection statistic
 s\, up to higher-order corrections in the axion coupling. Thus\, the class
 ical field approximation works even when the axion field's state is not cl
 assical at all. The same conclusion holds for a variety of other axion eff
 ects said to be inherently quantum.\n\nhttps://indico.ibs.re.kr/event/1372
 /
LOCATION:C101 (Changjo-gwan\, KAIST (Munji Campus))
URL:https://indico.ibs.re.kr/event/1372/
END:VEVENT
END:VCALENDAR