Effects of Laser-Annealing on Fixed-Frequency Superconducting Qubits
arXiv:2206.03099 · doi:10.1063/5.0102092
Abstract
As superconducting quantum processors increase in complexity, techniques to overcome constraints on frequency crowding are needed. The recently developed method of laser-annealing provides an effective post-fabrication method to adjust the frequency of superconducting qubits. Here, we present an automated laser-annealing apparatus based on conventional microscopy components and demonstrate preservation of highly coherent transmons. In one case, we observe a two-fold increase in coherence after laser-annealing and perform noise spectroscopy on this qubit to investigate the change in defect features, in particular two-level system defects. Finally, we present a local heating model as well as demonstrate aging stability for laser-annealing on the wafer scale. Our work constitutes an important first step towards both understanding the underlying physical mechanism and scaling up laser-annealing of superconducting qubits.
11 pages, 7 figures
References in corpus (11)
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Charge insensitive qubit design derived from the Cooper pair box
- Decoherence benchmarking of superconducting qubits
- Measurement and Control of Quasiparticle Dynamics in a Superconducting Qubit
- Room-temperature manipulation and decoherence of a single spin in diamond
- Observation of directly interacting coherent two-level systems in a solid
- Scalable High-Performance Fluxonium Quantum Processor
- Complete stabilization and improvement of the characteristics of tunnel junctions by thermal annealing
- Optimizing frequency allocation for fixed-frequency superconducting quantum processors
- Perspective: Reproducible Coherence Characterization of Superconducting Quantum Devices
- Ternary Metal Oxide Substrates for Superconducting Circuits
Cited by in corpus (11)
- Noisy intermediate-scale quantum computers
- High-coherence superconducting qubits made using industry-standard, advanced semiconductor manufacturing
- Mitigation of frequency collisions in superconducting quantum processors
- Alternating Bias Assisted Annealing of Amorphous Oxide Tunnel Junctions
- All-microwave manipulation of superconducting qubits with a fixed-frequency transmon coupler
- Wafer-scale uniformity of Dolan-bridge and bridgeless Manhattan-style Josephson junctions for superconducting quantum processors
- Mitigating Losses of Superconducting Qubits Strongly Coupled to Defect Modes
- Post-fabrication frequency trimming of coplanar-waveguide resonators in circuit QED quantum processors
- Local laser-induced solid-phase recrystallization of phosphorus-implanted Si/SiGe heterostructures for contacts below 4.2 K
- Floquet Analysis of Frequency Collisions
- Efficient Frequency Allocation for Superconducting Quantum Processors Using Improved Optimization Techniques