Improving superconducting resonators in magnetic fields by reduced field-focussing and engineered flux screening
arXiv:1707.01936 · doi:10.1103/PhysRevApplied.8.034025
Abstract
We experimentally investigate superconducting coplanar waveguide resonators in external magnetic fields and present two strategies to reduce field-induced dissipation channels and resonance frequency shifts. One of our approaches is to significantly reduce the superconducting ground-plane areas, which leads to reduced magnetic field-focussing and thus to lower effective magnetic fields inside the waveguide cavity. By this measure, the field-induced losses can be reduced by more than one order of magnitude in mT out-of-plane magnetic fields. When these resonators are additionally coupled inductively instead of capacitively to the microwave feedlines, an intrinsic closed superconducting loop is effectively shielding the heart of the resonator from magnetic fields by means of flux conservation. In total, we achieve a reduction of the field-induced resonance frequency shift by up to two orders of magnitude. We combine systematic parameter variations on the experimental side with numerical magnetic field calculations to explain the effects of our approaches and to support our conclusions. The presented results are relevant for all areas, where high-performance superconducting resonators need to be operated in magnetic fields, e.g. for quantum hybrid devices with superconducting circuits or electron spin resonance detectors based on coplanar waveguide cavities.
References in corpus (43)
- Hybrid quantum circuits: Superconducting circuits interacting with other quantum systems
- Strong Coupling of a Spin Ensemble to a Superconducting Resonator
- High cooperativity coupling of electron-spin ensembles to superconducting cavities
- Hybrid Quantum Processors: molecular ensembles as quantum memory for solid state circuits
- Hybrid quantum circuit with a superconducting qubit coupled to a spin ensemble
- Coplanar Waveguide Resonators for Circuit Quantum Electrodynamics
- Cavity QED with magnetically coupled collective spin states
- Cavity-QED based on collective magnetic dipole coupling: spin ensembles as hybrid two-level systems
- High Kinetic Inductance Superconducting Nanowire Resonators for Circuit QED in a Magnetic Field
- Strong magnetic coupling of an ultracold gas to a superconducting waveguide cavity
- Anisotropic rare-earth spin ensemble strongly coupled to a superconducting resonator
- Microwave response of vortices in superconducting thin films of Re and Al
- Interfacing Superconducting Qubits and Telecom Photons via a Rare-Earth Doped Crystal
- Quantum information processing with single photons and atomic ensembles in microwave coplanar waveguide resonators
- Proposal for manipulating and detecting spin and orbital states of trapped electrons on helium using cavity quantum electrodynamics
- An atomic interface between microwave and optical photons
- Reliable determination of vortex parameters from measurements of the microwave complex resistivity
- Rare earth spin ensemble magnetically coupled to a superconducting resonator
- Coupling single molecule magnets to quantum circuits
- Probing dynamics of an electron-spin ensemble via a superconducting resonator
- Manipulation and coherence of ultra-cold atoms on a superconducting atom chip
- Magnetic strong coupling in a spin-photon system and transition to classical regime
- Wirebond crosstalk and cavity modes in large chip mounts for superconducting qubits
- Magnetic hysteresis effects in superconducting coplanar microwave resonators
- Superconducting coplanar waveguide resonators for low temperature pulsed electron spin resonance spectroscopy
- Cavity QED with an ultracold ensemble on a chip: prospects for strong magnetic coupling at finite temperatures
- Meissner effect in superconducting microtraps
- Improving the performance of superconducting microwave resonators in magnetic fields
- Reducing microwave loss in superconducting resonators due to trapped vortices
- YBCO microwave resonators for strong collective coupling with spin ensembles
- Magnetic field tuning of coplanar waveguide resonators
- Observing electron spin resonance between 0.1 and 67 GHz at temperatures between 50 mK and 300 K using broadband metallic coplanar waveguides
- Microwave spectroscopy on heavy-fermion systems: probing the dynamics of charges and magnetic moments
- Reducing vortex losses in superconducting microwave resonators with microsphere patterned antidot arrays
- Broadband electron spin resonance from 500 MHz to 40 GHz using superconducting coplanar waveguides
- Measurement of the nonlinear Meissner effect in superconducting Nb films using a resonant microwave cavity: A probe of unconventional pairing symmetries
- Surface-resistance measurements using superconducting stripline resonators
- Inductances and attenuation constant for a thin-film superconducting coplanar waveguide resonator
- Quantum information processing with trapped electrons and superconducting electronics
- Inductively coupled superconducting half wavelength resonators as persistent current traps for ultracold atoms
- Metallic coplanar resonators optimized for low-temperature measurements
- Trapped electron coupled to superconducting devices
- Broadband architecture for galvanically accessible superconducting microwave resonators
Cited by in corpus (11)
- Coupling ultracold atoms to a superconducting coplanar waveguide resonator
- Perspective: Challenges and Transformative Opportunities in Superconductor Vortex Physics
- Magnetic field resilient high kinetic inductance superconducting niobium nitride coplanar waveguide resonators
- Tunable Nb superconducting resonators based upon a Ne-FIB-fabricated constriction nanoSQUID
- Magnetic Field Dependent Microwave Losses in Superconducting Niobium Microstrip Resonators
- Catastrophic magnetic flux avalanches in NbTiN superconducting resonators
- Resonance inversion in a superconducting cavity coupled to artificial atoms and a microwave background
- Controllable tunnelling of single flux-quanta mediated by quantum phase-slip in disordered superconducting loops
- Tunable superconducting two-chip lumped element resonator
- Equidistant resonance jumps in superconducting coplanar resonators driven by Abrikosov vortices
- Magnetic hysteresis of a superconducting microstrip resonator with a high edge barrier