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DTSTART;TZID=America/Chicago:20261008T123000
DTEND;TZID=America/Chicago:20261008T133000
DTSTAMP:20261008T021052Z
SUMMARY:Special CFP Seminar: Andrew Laeuger: Levitated sensors in Fabry–Pérot cavities: gravitational wave response and nonperturbative optomechanics
UID:647252@northwestern.edu
TZID:America/Chicago
DESCRIPTION:Abstract:  Optically levitated sensors inside a Fabry–Pérot cavity have been proposed for high-frequency gravitational-wave detection\, but their optimal configuration exhibits a counterintuitive spatial asymmetry.  We provide a fully relativistic derivation of the interaction between a gravitational wave and a levitated object in an optical cavity and explain the asymmetry from multiple gauge perspectives. We also highlight some important consequences of the asymmetry for noise couplings in the experiment. We then consider the behavior of the experiment with levitated dieletric sensors of finite thickness and substantial areal extent\, outlining a procedure for self-consistently computing the response of the cavity-sensor system to external perturbations. We demonstrate that even when the sensor is relatively optically thin\, it sources substantial reorganization of the cavity fields\, generating noticeable deviations from the standard perturbation theory predictions which are typically used to describe levitated sensors.  Speaker: Andrew Laeuger\, Graduate Student\, Caltech  Host: Andrew Geraci     Keywords: Physics\, CFP
LOCATION:Technological Institute\, F160\, 2145 Sheridan Road\, Evanston\, IL 60208
TRANSP:OPAQUE
URL:https://planitpurple.northwestern.edu/event/647252
CREATED:20261005T050000Z
STATUS:CONFIRMED
LAST-MODIFIED:20261005T050000Z
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