About this episode
In this episode of The New Quantum Era, your host, Sebastian Hassinger sits down with Dr. Yvonne Gao, a leading experimental physicist specializing in superconducting devices and quantum cavities. Recorded at the American Physical Society's Global Summit, the conversation explores the intersection of curiosity-driven research and technological advancement in quantum physics.Key Topics Discussed1. Research Focus: Quantum Cavities and SuperpositionDr. Gao shares her team's work on using cavities (harmonic oscillators) coupled with a single qubit to probe fundamental quantum effects.The experiments focus on quantum superposition and entanglement using minimal hardware—just one qubit and one cavity—eschewing the race for more qubits in favor of deeper scientific insights.Discussion of "cat states" as iconic demonstrations of quantum superposition, and how their properties can be engineered for robustness and sensitivity without specialized hardware.2. Experimental InnovationThe team investigates loss mechanisms in cavity-based quantum states and explores ways to make these states more resilient through state engineering rather than hardware changes.Dr. Gao describes using standard, "vanilla" qubits and cavities, making their techniques accessible to other labs.3. Fundamental Questions and Quantum PlaygroundDr. Gao emphasizes the value of the circuit QED platform as a "playground" for exploring quantum phenomena, particularly entanglement and its quantification in real hardware.The challenge of visualizing and intuitively understanding quantum phenomena is highlighted, with experiments designed to make abstract concepts more tangible.4. Device Fabrication and AdvancementsDr. Gao's lab at NUS has developed in-house fabrication capabilities, gradually building up expertise and infrastructure.The field is witnessing rapid improvements in device performance, driven by advances in materials science and process integration.5. Multipartite Entanglement and Future DirectionsPlans for multi-cavity devices: Moving from single and two-cavity systems to three, enabling the study of tripartite entanglement and richer quantum dynamics.The potential for these systems to serve as both research tools and pedagogical aids, demonstrating quantum strangeness in a hands-on way.6. Synergy Between Science and TechnologyThe conversation explores the unique moment in quantum research where fundamental science and technological objectives are closely aligned.Knowledge flows both ways: curiosity-driven e
