The physical description of all materials is rooted in quantum mechanics, which describes
how atoms bond and electrons interact at a fundamental level. Although these quantum …

The order parameter and its variations in space and time in many different states in
condensed matter physics at low temperatures are described by the complex function Ψ (r …

Magnonics is a young field of research and technology emerging at the interfaces between
the study of spin dynamics, on the one hand, and a number of other fields of nanoscale …

Quantum magnetism originates from the exchange coupling between quantum mechanical
spins. Here, we report on the observation of nearest-neighbor magnetic correlations …

This article reviews experimental and theoretical work on Bose-Einstein condensation in
quantum magnets. These magnets are natural realizations of gases of interacting bosons …

We follow the evolution of the elementary excitations of the quantum antiferromagnet TlCuCl
3 through the pressure-induced quantum critical point, which separates a dimer-based …

Neutron scattering has become a key technique for investigating the properties of materials
on an atomic scale. The uniqueness of this method is based on the fact that the wavelength …

A quantum critical point (QCP) is a singularity in the phase diagram arising because of
quantum mechanical fluctuations. The exotic properties of some of the most enigmatic …

Magnetic clusters, ie, assemblies of a finite number (between two or three and several
hundred) of interacting spin centers which are magnetically decoupled from their …

We discuss designer Hamiltonians—lattice models tailored to be free from sign problems
(“de-signed”) when simulated with quantum Monte Carlo (QMC) methods but which still host …