Environment is assumed to play a negative role in quantum mechanics, destroying the
coherence in a quantum system and, thus, randomly changing its state. However, for a …

Theoretical studies of magnets have traditionally concentrated on either classical spins, or
the extreme quantum limit of spin-1/2. However, magnets built of spin-1 moments are also …

Large spin systems can exhibit unconventional types of magnetic ordering, different from the
ferromagnetic or Néel-like antiferromagnetic order commonly found in spin 1/2 systems …

Cold atoms bring new opportunities to study quantum magnetism, and in particular, to
simulate quantum magnets with symmetry greater than SU (2). Here we explore the …

Large-scale gravitational phenomena are famously difficult to observe, making parallels in
condensed matter physics a valuable resource. Here we show how spin nematic phases …

Using the density-matrix renormalization-group method, we studied the ground state of the
one-dimensional S= 1 Bose-Hubbard model with local three-body interactions, which can be …

We study the quadratic Zeeman effect (QZE) in a system of antiferromagnetic spin-1 bosons
on a square lattice and derive the ground-state phase diagrams by means of quantum …

We explore several classes of quadrupolar ordering in a system of antiferromagnetically
coupled quantum spin-1 dimers, which are stacked in the triangular lattice geometry forming …

We provide a route to generate nematic order in a spin-1/2 system. Unlike the well-known
magnon-binding mechanism, our spin nematics requires neither the frustration effect nor …

We study the dynamical instabilities of superfluid flows in the S= 1 Bose-Hubbard model.
The time evolution of each spin component in a condensate is calculated based on the …