Recent interest in aspects common to quantum information and condensed matter has
prompted a flurry of activity at the border of these disciplines that were far distant until a few …

Abstract The Bose–Einstein condensate (BEC) is a fascinating state of matter predicted to
occur for particles obeying Bose statistics. Although the BEC has been observed with …

Bose–Einstein condensation denotes the formation of a collective quantum ground state of
identical particles with integer spin or intrinsic angular momentum. In magnetic insulators …

Magnesium diboride, MgB2, has the highest transition temperature (T c= 39 K) of the known
metallic superconductors. Whether the anomalously high T c can be described within the …

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 …

Two new gapless quantum spin-liquid candidates with S= 1 (Ni 2+) moments: the 6 HB
phase of Ba 3 NiSb 2 O 9 with a Ni 2+-triangular lattice and the 3C phase with a Ni 2/3 Sb …

The detection and certification of entanglement and quantum correlations in materials is of
fundamental and far‐reaching importance, and has seen significant recent progress. It …

We demonstrate that two well-established experimental techniques of condensed-matter
physics, neutron-diffraction scattering and measurement of magnetic susceptibility, can be …

We apply the average spectrum method to the problem of getting the excitation spectrum
from imaginary-time quantum Monte Carlo (QMC) simulations. We show that with high …

The S= 1 2 quantum system TlCuCl 3 has a nonmagnetic singlet ground state and a finite-
energy gap to triplet excited states. At H c∼ 6 T it undergoes field-induced three …