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High Energy Phenomenology Seminar: Jan Schuette- Engel (UIUC) "Detecting High-Frequency Gravitational Waves with Microwave Cavities"

Event Type
Seminar/Symposium
Sponsor
Department of Physics
Virtual
wifi event
Date
Feb 18, 2022   12:00 pm  
Speaker
Jan Schuette- Engel (UIUC)
Contact
Brandy Koebbe
E-Mail
BKOEBBE@ILLINOIS.EDU
Views
21

We give a detailed treatment of electromagnetic signals generated by gravitational waves (GWs) in resonant cavity experiments. Our investigation corrects and builds upon previous studies by carefully accounting for the gauge dependence of relevant quantities. We work in a preferred frame for the laboratory, the proper detector frame, and show how to resum short-wavelength effects to provide analytic results that are exact for GWs of arbitrary wavelength. This formalism allows us to firmly establish that, contrary to previous claims, cavity experiments designed for the detection of axion dark matter can already search for high-frequency GWs with strains as small as $h\sim 10^{-22}-10^{-21}$. We also argue that directional detection is possible in principle using readout of multiple cavity modes. 

 
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