Magnetic-field resilience of 3D transmons with thin-film Al/AlO${}_x$/Al Josephson junctions approaching 1 T

Abstract

Magnetic-field-resilient superconducting circuits enable sensing applications and hybrid quantum-computing architectures involving spin or topological qubits and electro-mechanical elements, as well as studying flux noise and quasiparticle loss. We investigate the effect of in-plane magnetic fields up to 1 T on the spectrum and coherence times of thin-film 3D aluminum transmons. Using a copper cavity, unaffected by strong magnetic fields, we can solely probe the magnetic-field effect on the transmons. We present data on a single-junction and a SQUID transmon, that were cooled down in the same cavity. As expected, transmon frequencies decrease with increasing fields, due to a suppression of the superconducting gap and a geometric Fraunhofer-like contribution. Nevertheless, the thin-film transmons show strong magnetic-field resilience: both transmons display microsecond coherence up to at least 0.65 T, and $T_1$ remains above 1 $\mu$s over the entire measurable range. SQUID spectroscopy is feasible up to 1 T, the limit of our magnet. We conclude that thin-film aluminum Josephson junctions are a suitable hardware for superconducting circuits in the high-magnetic-field regime.

References in corpus (50)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Charge insensitive qubit design derived from the Cooper pair box
• Cavity quantum electrodynamics for superconducting electrical circuits: an architecture for quantum computation
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Observation of high coherence in Josephson junction qubits measured in a three-dimensional circuit QED architecture
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• Qubit architecture with high coherence and fast tunable coupling
• A Coherent Spin-Photon Interface in Silicon
• Engineering cryogenic setups for 100-qubit scale superconducting circuit systems
• Strong spin-photon coupling in silicon
• Experimental Realization of Non-Abelian Geometric Gates
• Surface participation and dielectric loss in superconducting qubits
• Demonstration of Universal Parametric Entangling Gates on a Multi-Qubit Lattice
• High Kinetic Inductance Superconducting Nanowire Resonators for Circuit QED in a Magnetic Field
• Majorana Fermions in Proximity-coupled Topological Insulator Nanowires
• Relaxation and frequency shifts induced by quasiparticles in superconducting qubits
• Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
• Dephasing of Electrons in Mesoscopic Metal Wires
• Laser-annealing Josephson junctions for yielding scaled-up superconducting quantum processors
• Tunable Superconducting Qubits with Flux-Independent Coherence
• Microwave response of vortices in superconducting thin films of Re and Al
• Origin and Suppression of $1/f$ Magnetic Flux Noise
• Top-transmon: hybrid superconducting qubit for parity-protected quantum computation
• Using a qubit to measure photon number statistics of a driven, thermal oscillator
• Improving wafer-scale Josephson junction resistance variation in superconducting quantum coherent circuits
• Magnetic field resilient superconducting coplanar waveguide resonators for hybrid cQED experiments
• Reliable determination of vortex parameters from measurements of the microwave complex resistivity
• Evolution of Nanowire Transmons and Their Quantum Coherence in Magnetic Field
• A graphene transmon operating at 1 T
• Implementation of a transmon qubit using superconducting granular aluminum
• Magnetic hysteresis effects in superconducting coplanar microwave resonators
• Coupling microwave photons to a mechanical resonator using quantum interference
• Coupling carbon nanotube mechanics to a superconducting circuit
• Dielectric surface loss in superconducting resonators with flux-trapping holes
• A gate-tunable, field-compatible fluxonium
• Superconducting granular aluminum resonators resilient to magnetic fields up to 1 Tesla
• Overlap junctions for high coherence superconducting qubits
• Displacemon electromechanics: how to detect quantum interference in a nanomechanical resonator
• Realization of a Carbon-Nanotube-Based Superconducting Qubit
• On-chip SQUID measurements in the presence of high magnetic fields
• Sideband-resolved resonator electromechanics on the single-photon level based on a nonlinear Josephson inductance
• Magnetic-Field-Compatible Superconducting Transmon Qubit
• Fermi-liquid effects in the gapless state of marginally thin superconducting films
• Transmon Qubit in a Magnetic Field: Evolution of Coherence and Transition Frequency
• Large flux-mediated coupling in hybrid electromechanical system with a transmon qubit
• Synthesizing multi-phonon quantum superposition states using flux-mediated three-body interactions with superconducting qubits
• Mechanical frequency control in inductively coupled electromechanical systems
• Meissner transmon qubit - architecture and characterization

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• Prospects of cooling a mechanical resonator with a transmon qubit in c-QED setup
• Optimal quantum resource generation in coupled transmons immersed in Markovian baths
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