PME Distinguished Quantum Colloquium Series - Zoe Z. Yan

<b>Microscopy of quantum correlations in an ultracold molecular gas</b> <br /><br />

Ultracold molecules are a promising platform for quantum simulation of spin physics due to their long-range interactions and large set of internal states. To understand the complex many-body states that emerge in these systems, both in and out of equilibrium, new experimental techniques are needed to probe molecule correlations in the strongly interacting regime. <br /><br />

We study the site-resolved dynamics of spin correlations in a gas of ultracold NaRb molecules in a 2D optical lattice. The molecules realize a quantum XY model with long-range interactions. Using a site-resolved Ramsey interferometric technique, we detect oscillations in nearest- and next-nearest-neighbor correlations due to spin interactions. Furthermore, we apply a periodic external microwave field to engineer XXZ spin Hamiltonians with tunable anisotropies. The correlations are measured by dissociating the molecules and detecting the corresponding Rb atoms with single-site resolution using a quantum gas microscope. The techniques presented here open new doors for probing quantum correlations in complex many-body systems of ultracold molecules.

<a href="https://uchicago.zoom.us/j/96269765712?pwd=cDQ5Y2NJQlFhRC9vM1RoUUlJNEdV…; Zoom Link</a>