Graduate Research Assistant
CurrentQuantum Information Science / Quantum Computer• Studied thermal annealing effects and grain size variation on the density of two-level systems (TLS), contributing to loss in superconducting circuits and qubits. Synthesized Josephson junction array resonators using a bridge-free technique to probe TLS distributions across different frequencies.• Developed an auto-detection algorithm for TLS location and distribution mapping, enabling immediate derivation of coupling strengths and decay rates. This algorithm quickly identifies TLS defects in the frequency spectrum, prevent- ing energy exchange with qubits and enhancing coherence times. Created an auto-tracking algorithm for microwave spectroscopy to track resonance frequencies of qubits or resonators in real-time, reducing measurement time by 92% compared to traditional flux-sweep methods.• Utilized High-Frequency Structure Simulator (HFSS) to simulate resonance frequencies and optimize electromagnetic fields in superconducting circuits. Designed high-efficiency, low-loss chip layouts, minimizing parasitic losses, and improving device coherence and stability. Integrated Josephson junctions and resonators, refining circuit geometry for fabrication and cryogenic compatibility.• Coordinated collaboration between the cryogenic measurements team, Transmission Electron Microscopy (TEM) group, and theory groups to ensure alignment in experimental and theoretical efforts, improving data interpretation and enhancing cross-disciplinary results.
