Quantum state manipulation and cooling of ultracold molecules

TL;DR

This paper reviews recent advances in cooling and manipulating ultracold molecules, highlighting two main techniques—association from ultracold atoms and direct laser cooling—that enable quantum control of molecular states.

Contribution

It provides a concise overview of the key methods used to achieve quantum regimes in molecular gases, emphasizing their significance for future scientific research.

Findings

Successful cooling of various molecular species to quantum regimes

Development of association and laser cooling techniques

Enhanced control over molecular internal and external states

Abstract

An increasingly large variety of molecular species are being cooled down to low energies in recent years, and innovative ideas and powerful techniques continue to emerge to gain ever more precise control of molecular motion. In this brief review we focus our discussions on two widely employed cooling techniques that have brought molecular gases into the quantum regime: association of ultracold atomic gases into quantum gases of molecules and direct laser cooling of molecules. These advances have brought into reality our capability to prepare and manipulate both internal and external states of molecules quantum mechanically, opening the field of cold molecules to a wide range of scientific explorations.