Feshbach Resonances in Ultracold Gases

TL;DR

This review discusses Feshbach resonances in ultracold gases, covering their theoretical background, experimental techniques, properties across species, and their crucial role in controlling interactions for quantum gas experiments.

Contribution

It provides a comprehensive overview of Feshbach resonances, integrating theory, experimental methods, and applications in ultracold atomic and molecular systems.

Findings

Feshbach resonances enable tunable interactions in ultracold gases.

Experimental techniques for identifying and characterizing resonances are summarized.

Applications include control of Bose-Einstein condensates, Fermi gases, and ultracold molecules.

Abstract

Feshbach resonances are the essential tool to control the interaction between atoms in ultracold quantum gases. They have found numerous experimental applications, opening up the way to important breakthroughs. This Review broadly covers the phenomenon of Feshbach resonances in ultracold gases and their main applications. This includes the theoretical background and models for the description of Feshbach resonances, the experimental methods to find and characterize the resonances, a discussion of the main properties of resonances in various atomic species and mixed atomic species systems, and an overview of key experiments with atomic Bose-Einstein condensates, degenerate Fermi gases, and ultracold molecules.