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SUMMARY:Doojin Kim (USD)\, "Quantum Sensing of Radiative Decay Photons wit
 h Superconducting Qubits"
DTSTART:20260527T060000Z
DTEND:20260527T070000Z
DTSTAMP:20260527T164200Z
UID:indico-event-1289@indico.ibs.re.kr
DESCRIPTION:Radiative decays of weakly interacting particles can produce e
 xtremely faint photons in the micro-eV range\, corresponding to GHz-scale 
 microwave signals. This energy scale naturally matches the transition freq
 uencies of superconducting qubits. In this talk\, I will discuss how trans
 mon qubits can be used as resonant quantum sensors for such rare decay pho
 tons. Starting from the classical and quantum descriptions of LC resonator
 s\, I will explain how Josephson-junction nonlinearity leads to an anharmo
 nic two-level system\, how an electromagnetic signal drives Rabi oscillati
 ons\, and how the resulting transition probability can be converted into a
 n event-rate estimate. I will then discuss sensitivity prospects for radia
 tive decays of dark matter and neutrinos\, including possible enhancements
  from reflective cavities\, effective volume scaling\, repeated measuremen
 ts\, and collective quantum protocols.\n\nhttps://indico.ibs.re.kr/event/1
 289/
LOCATION:CTPU Seminar room (Theory Bldg\, 4F)
URL:https://indico.ibs.re.kr/event/1289/
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