The physics of one-dimensional interacting bosonic systems is reviewed. Beginning with
results from exactly solvable models and computational approaches, the concept of bosonic …

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 …

Thallium copper chloride is a quantum spin liquid of S= 1/2 Cu 2+ dimers. Interdimer
superexchange interactions give a three-dimensional magnon dispersion and a spin gap …

We present a N 14 nuclear magnetic resonance study of a single crystal of CuBr 4 (C 5 H 12
N) 2 (BPCB) consisting of weakly coupled spin-1/2 Heisenberg antiferromagnetic ladders …

The phase diagram in temperature and magnetic field of the metal-organic, two-leg, spin-
ladder compound (C 5 H 12 N) 2 CuBr 4 is studied by measurements of the specific heat …

We present an introduction to the workings, units of measure, and general properties of
magnetic materials. This is intended as a “primer to interpretation of magnetic data” for those …

We investigate weakly coupled spin-1/2 ladders in a magnetic field. The work is motivated
by recent experiments on the compound (C 5 H 12 N) 2 CuBr 4 (BPCB). We use a …

Here we show that the Rényi entanglement entropy of a region of large size ℓ in a one-
dimensional critical model whose ground state breaks conformal invariance (such as in …

Exact formulas for the singularities of the dynamical structure factor, S zz (q, ω), of the S= 1/2
xxz spin chain at all q and any anisotropy and magnetic field in the critical regime are …

We measure by inelastic neutron scattering the spin excitation spectra as a function of
applied magnetic field in the quantum spin-ladder material (C 5 H 12 N) 2 CuBr 4. Discrete …