Tuning a 3D Microwave Cavity via Superfluid Helium at MilliKelvin Temperatures

Abstract

Frequency tunability of 3D microwave cavities opens up numerous possibilities for their use in hybrid quantum systems and related technologies. For many applications it is desirable to tune the resonance at cryogenic temperatures without mechanical actuation. We show that a superconducting 3D microwave cavity can be tuned at the percent level by taking advantage of the dielectric properties of superfluid ${}^4$He at milliKelvin temperatures, without affecting its intrinsic quality factor -- reaching $3\times 10^5$ in the present experiment.

3 pages, 3 figures, submitted version

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Cited by in corpus (12)

• Cavity Spintronics: An Early Review of Recent Progress in the Study of Magnon-Photon Level Repulsion
• Microwave Rabi resonances beyond the small-signal regime
• Integrating superfluids with superconducting qubit systems
• Atomic microwave-to-optical signal transduction via magnetic-field coupling in a resonant microwave cavity
• Cryogenic Microwave Filter Cavity with a Tunability Greater than 5 GHz
• On the use of ferroelectric material in the detection of dark matter axions
• Anomalous attenuation of piezoacoustic surface waves by liquid helium thin films
• Electro-Mechanical Tuning of High-Q Bulk Acoustic Phonon Modes at Cryogenic Temperatures
• Amplitude Noise Cancellation of Microwave Tones
• Creation of superposition of arbitrary states encoded in two three-dimensional cavities
• Experimental Implementation of a Large Scale Multipost Re-Entrant Array
• Precision measurements of the zero temperature dielectric constant and density of liquid ${}^4$He