Cryogenic Microwave Filter Cavity with a Tunability Greater than 5 GHz

Abstract

A wide variety of applications of microwave cavities, such as measurement and control of superconducting qubits, magnonic resonators, and phase noise filters, would be well served by having a highly tunable microwave resonance. Often this tunability is desired in situ at low temperatures, where one can take advantage of superconducting cavities. To date, such cryogenic tuning while maintaining a high quality factor has been limited to $\sim 500$ MHz. Here we demonstrate a three-dimensional superconducting microwave cavity that shares one wall with a pressurized volume of helium. Upon pressurization of the helium chamber the microwave cavity is deformed, which results in in situ tuning of its resonant frequency by more than 5 GHz, greater than 60% of the original 8 GHz resonant frequency. The quality factor of the cavity remains approximately constant at $\approx 7\times 10^3$ over the entire range of tuning. As a demonstration of its usefulness, we implement a tunable cryogenic phase noise filter, which reduces the phase noise of our source by approximately 10 dB above 400 kHz.

References in corpus (20)

• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Strongly coupled magnons and cavity microwave photons
• Observation of high coherence in Josephson junction qubits measured in a three-dimensional circuit QED architecture
• Preparation and Detection of a Mechanical Resonator Near the Ground State of Motion
• Bidirectional conversion between microwave and light via ferromagnetic magnons
• Resolving magnon number states in quantum magnonics
• Implementing a Universal Gate Set on a Logical Qubit Encoded in an Oscillator
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• Reaching 10 ms single photon lifetimes for superconducting aluminum cavities
• Quantum non-demolition detection of an itinerant microwave photon
• Cavity mediated manipulation of distant spin currents using cavity-magnon-polariton
• Programmable interference between two microwave quantum memories
• Silicon nitride membrane resonators at millikelvin temperatures with quality factors exceeding $10^8$
• Rigorous analysis of highly tunable cylindrical Transverse Magnetic mode re-entrant cavities
• Tunable magnon-photon coupling in a compensating ferrimagnet - from weak to strong coupling
• Piezoelectric Tunable Microwave Superconducting Cavity
• Tuning a 3D Microwave Cavity via Superfluid Helium at MilliKelvin Temperatures
• Piezoelectric Voltage Coupled Reentrant Cavity Resonator
• A split-cavity design for the incorporation of a DC bias in a 3D microwave cavity
• Applying Electric and Magnetic Field Bias in a 3D Superconducting Waveguide Cavity with High Quality Factor

Cited by in corpus (11)

• Cavity magnomechanical storage and retrieval of quantum states
• Strong magnon-photon coupling within a tunable cryogenic microwave cavity
• Casimir spring and dilution in macroscopic cavity optomechanics
• Wavelength transduction from a 3D microwave cavity to telecom using piezoelectric optomechanical crystals
• Integrating superfluids with superconducting qubit systems
• Prototype Superfluid Gravitational Wave Detector
• HeLIOS: The Superfluid Helium Ultralight Dark Matter Detector
• Frequency Fluctuations in Tunable and Nonlinear Microwave Cavities
• A Novel Architecture for room temperature microwave optomechanical experiments
• Amplitude Noise Cancellation of Microwave Tones
• Experimental Implementation of a Large Scale Multipost Re-Entrant Array