[CANCELLED] Physics Department - Cavity-Enabled Quantum Interfaces: Transduction, Entanglement, and Fast Qubit Control

Abstract
Cavities are indispensable tools in advancing both foundational quantum physics and scalable quantum technologies. In this talk, I will present two intertwined lines of research where the cavity-mediated interactions and cavity-enhanced optics pave the way for robust, scalable quantum information processing. The first topic explores a cryogenic cavity QED system, where atoms interact strongly with a superconducting cavity. I will discuss a recent demonstration of efficient transduction between microwave and optical photons via a phase-matched atomic ensemble, enabling hybrid quantum networks. I will also outline ongoing work toward using the superconducting cavity’s coherence properties to generate entanglement between atomic qubits. While currently in a proof-of-principle phase, this approach builds on a series of successful experiments in optical cavity platforms and has the potential to beat the record of entanglement-assisted metrology. The second topic focuses on a new apparatus: the development of a stabilized, virtually imaged phased array (VIPA) for quantum control. This architecture extends the concept of cavity-stabilized modes to enable fast operation and high-fidelity qubit addressing, thereby overcoming the limitations of current tweezer-array systems, which are constrained by AOD-induced aberrations.