The renormalization group plays an essential role in many areas of physics, both
conceptually and as a practical tool to determine the long-distance low-energy properties of …

This article reviews theoretical and experimental advances in Efimov physics, an array of
quantum few-body and many-body phenomena arising for particles interacting via short …

The fastest possible collective response of a quantum many-body system is related to its
excitations at the highest possible energy. In condensed matter systems, the time scale for …

A recent rejuvenation of experimental and theoretical interest in the physics of few-body
systems has provided deep, fundamental insights into a broad range of problems. Few-body …

In this report we discuss the dynamical response of heavy quantum impurities immersed in a
Fermi gas at zero and at finite temperature. Studying both the frequency and the time …

We observe two consecutive heteronuclear Efimov resonances in an ultracold Li-Cs mixture
by measuring three-body loss coefficients as a function of magnetic field near a Feshbach …

We report the observation of a three-body recombination resonance in an ultracold gas of
cesium atoms at a very large negative value of the s-wave scattering length. The resonance …

Efimov trimers are exotic three-body quantum states that emerge from the different types of
three-body continua in the vicinity of two-atom Feshbach resonances. In particular, as the …

We measure the critical scattering length for the appearance of the first three-body bound
state, or Efimov three-body parameter, at seven different Feshbach resonances in ultracold …

We perform precise studies of two-and three-body interactions near an intermediate-strength
Feshbach resonance in K 39 at 33.5820 (14) G. Precise measurement of dimer binding …