Investigations into the zero-temperature phases in various frustrated and random Ising
models in a transverse or tunnelling field have caught attention very recently in the context of …

Long-range interactions are relevant for a large variety of quantum systems in quantum
optics and condensed matter physics. In particular, the control of quantum–optical platforms …

The critical breakdown of a one-dimensional quantum magnet with long-range interactions
is studied by investigating the high-field polarized phase of the anisotropic XY model in a …

We study pairs of interacting self-avoiding walks {ω 1, ω 2} on the 3 d simple cubic lattice.
They have a common origin ω 0 1= ω 0 2, and are allowed to overlap only at the same …

Exact calculations using transfer matrices on finite strips are performed to study the two-
dimensional problem of one lattice animal with an attractive nearest neighbour interaction …

The critical behaviour of the two-dimensional bond-diluted transverse Ising model is
investigated by an approximate decimation transformation. The full critical surface is …

The melting phase diagram of a double-stranded DNA in poor solvent is studied using the
pruned and enriched Rosenbluth method on a simple cubic lattice. As the solvent quality is …

Within the framework of an effective-field theory with correlation evaluated for the Ising
model with transverse field, the authors discuss the following cases: a diluted ferromagnetic …

We show numerical evidence in 2 and 3 dimensions that an alternating polyampholyte
undergoes a coil-globule transition as the temperature decreases and that this transition is …

We reexamine the well-studied one-dimensional spin-1/2 XY model to reveal its nontrivial
energy spectrum, in particular the energy gap between the ground state and the first excited …