The prospect of cooling matter down to temperatures that are close to absolute zero raises
intriguing questions about how chemical reactivity changes under these extreme conditions …

1. INTRODUCTION Beams of atoms and molecules are stalwart tools for spectroscopy and
studies of collisional processes. 1− 4 The supersonic expansion technique can create cold …

Full control of molecular interactions, including reactive losses, would open new frontiers in
quantum science. We demonstrate extreme tunability of ultracold chemical reaction rates by …

Ultracold molecules offer unprecedented opportunities for the controlled interrogation of
molecular events, including chemical reactivity in the ultimate quantum regime. The …

The motion of neutral molecules in a beam can be manipulated and controlled with
inhomogeneous electric and magnetic fields. Static fields can be used to deflect or focus …

Resonances in ultracold collisions involving heavy molecules are difficult to simulate
theoretically and have proven challenging to detect. Here we report the observation of …

The goal of the present article is to review the major developments that have led to the
current understanding of molecule–field interactions and experimental methods for …

Collisional complexes, which are formed as intermediate states in molecular collisions, are
typically short-lived and decay within picoseconds. However, in ultracold collisions involving …

A diversity of experimental techniques has been developed over the last 25 years to create
samples of molecular gases at temperatures close to the Absolute Zero—here we consider …

Since the original work on Bose–Einstein condensation,, the use of quantum degenerate
gases of atoms has enabled the quantum emulation of important systems in condensed …