Presenting Author: Raymond Simmonds, National Institute of Standards & Technology, Boulder CO
Contributing Authors: Xiaoyue Jin, Taewan Noh, Sudhir Sahu, Trevyn Larson, Katarina Cicak, Zachary Parrott, Kaixuan Ji, Tongyu Zhao, Shlomi Kotler, Eliot Kapit, Bryan Gard, Kurt Jacobs, Zhihao Xiao, Emery Doucet, Luke Govia, Archana Kamal, Leonardo Ranzani, Florent Lecocq, Jose Aumentado, John Teufel
Over 15 years ago, parametric coupling was proposed as a way to entangle flux qubits at their “sweet spots” with frequencies that were far detuned from each other. This was a possible solution to the difficulty with optimizing the spectrum of flux qubits that were extremely sensitivity to the variations in the critical current of their smallest fabricated Josephson junctions. After one major demonstration, this strategy was soon abandoned. In contrast, ion trap systems have always relied on parametric interactions that are naturally more flexible, allowing all-to-all tunable coupling between individual qubits. Over a decade ago, our group at NIST (in Boulder, CO) revived the parametric coupling strategy as a powerful tool for engineering interactions between superconducting circuits. In this talk, I will explain our parametric ideology and highlight our group's continued efforts to develop non-resonant, parametrically induced coupled interactions between transmon-based qubits and cavities to enable fast, high fidelity gate operations and measurements.[1-2] Finally, I'll discuss improving, connecting, and expanding these systems for constructing analog quantum simulators or processing quantum information.