The seminar will take place from 11-12 p.m. PDT in Physics 375 North. Our speaker is Emma Deist (UC Berkeley). Details are below.

Cavity QED with a neutral atom tweezer array

Cavity quantum electrodynamics provides a powerful set of tools for manipulating atomic systems, facilitating weak and strong measurements of different atomic observables and enabling long-range interactions by the exchange of real or virtual cavity photons. Neutral atom tweezer arrays have likewise achieved impressive results in quantum simulation and computation, offering an unprecedented level of single atom control. In this talk, I will present a novel experimental system that combines these technologies: a tweezer array of single rubidium atoms trapped in a high-finesse optical cavity. First, we use single atoms to characterize the fields of our bichromatic cavity, realizing a superresolution scanning-probe measurement of ac Stark shifts. Next, we use the cavity to perform rapid state detection of a single atom in the array, achieving measurement fidelities exceeding 99% in tens of microseconds. This sub-system selective measurement preserves the coherence of the remainder of the system, thus realizing a requirement of many error correction schemes for quantum computation and metrology. The single-atom control demonstrated in this work paves the way to exploring correlated many-body states in optical cavities at the single-atom level.