Ultracold atoms trapped in laser-generated optical lattices serve as a versatile platform for
quantum simulations. However, as these lattices are infinitely stiff, they do not allow to …

Prototypical models and their material incarnations are cornerstones to the understanding of
quantum magnetism. Here we show theoretically that the recently synthesized magnetic …

This review addresses experiments on elasticity, plasticity, and flow of solid He 4 and He 3,
focusing on dislocations and other defects that are responsible for the unusual mechanical …

We present a theory that explains the experimentally observed crystallization of a dilute
dysprosium condensate into a lattice of droplets. The key ingredient of our theory is a …

Since its discovery in 1938, superfluidity has been the subject of much investigation
because it provides a unique example of a macroscopic manifestation of quantum …

Typical Kondo insulators (KIs) can have a nontrivial Z 2 topology because the energy gap
opens at the Fermi energy (EF) by a hybridization between odd-and even-parity bands. SmB …

We employ the nonperturbative functional renormalization group to study models with an O
(N 1)⊕ O (N 2) symmetry. Here different fixed points exist in three dimensions …

We discuss fluctuations in a dilute two-dimensional Bose-condensed dipolar gas, which has
a roton-maxon character of the excitation spectrum. We calculate the density-density …

We report on electric-field and temperature-dependent transport measurements in exfoliated
thin crystals of the Bi 2 Se 3 topological insulator. At low temperatures (< 50 K) and when the …

Recently the resistance saturation at low temperature in the Kondo insulator SmB 6, a long-
standing puzzle in condensed matter physics, was proposed to originate from a topological …