Quantum Error Correction with GKP States in Superconducting Circuits
May 9 (Thursday), 2024
11:30 am to 12:30 pm (EDT)
Virtual via Zoom
Abstract: Improving quantum error correction schemes is a central challenge in developing fault-tolerant quantum processors. A high-quality bosonic mode controlled by an auxiliary nonlinear element has proven to be a valid candidate to replace the standard two-level-system approach with a hardware efficient approach. Following the visionary proposal of Gottesman, Kitaev and Preskill (GKP), Nord Quantique has recently prepared, error-corrected, and measured these GKP grid states within a single mode and shown that the logical qubit lifetime increases when error corrected. This presentation explores quantum error correction with GKP states, demonstrating how advancements in device fabrication enable quantum error correction processes to correct more errors than they introduce.
Biography: Dr. Nicholas Frattini received his PhD from Yale University in 2021 for his work on three-wave mixing with superconducting circuits under the supervision of Michel Devoret. As a postdoc, he also worked on microwave-to-optic transduction with Konrad Lehnert and Cindy Regal at JILA in Boulder, Colorado before joining Nord Quantique’s Quantum Hardware team to advance the state-of-the-art in quantum error correction. He has worked on simultaneously stabilized superpositions of coherent states—so-called Schrödinger’s cat states—to form a protected Kerr-cat qubit. It’s one of only a handful of devices to ever enhance the lifetime of encoded quantum information beyond the lifetime of its individual components