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SUMMARY:Probing gravitational waves with the orbital angular momentum of l
 ight
DTSTART;VALUE=DATE-TIME:20261025T064000Z
DTEND;VALUE=DATE-TIME:20261025T070000Z
DTSTAMP;VALUE=DATE-TIME:20261025T025929Z
UID:indico-contribution-3020@indico.itp.ac.cn
DESCRIPTION:Speakers: Haorong Wu (Wuhan University)\nWe introduce an alter
 native approach to gravitational-wave (GW) detection in which GW informati
 on is encoded in the orbital angular momentum (OAM) states of photons. Sta
 rting from the propagation of vortex light in linearized gravity\, we show
  that interaction with a GW induces transitions from an initial photon OAM
  state to neighboring OAM sidebands\, providing a different optical observ
 able of spacetime perturbations. Building on this interaction\, we develop
  a GW detection framework in which the complex amplitudes of the induced O
 AM sidebands are measured using parametrized quantum state tomography. A V
 -shaped configuration provides sufficient independent degrees of freedom t
 o resolve all seven wave parameters characterizing a GW. We further invest
 igate the detectability of this approach by constructing a noise budget ov
 er the frequency range from 1 mHz to 100 Hz. The symmetry properties of th
 e OAM states allow the GW signal to appear predominantly in the differenti
 al mode\, while technical noise enters primarily through the common mode\,
  enabling its suppression through balanced detection. Our analysis further
  shows that a compact\, short-arm configuration can reduce mode-crosstalk 
 noise without sacrificing the GW response. Together\, these results establ
 ish a framework for probing GWs through the spatial-mode Hilbert space of 
 light and motivate OAM-based sensing as a complementary approach to future
  GW detection.\n\nhttps://indico.itp.ac.cn/event/427/contributions/3020/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/3020/
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