Quantum phase transitions, driven by quantum fluctuations, exhibit
intriguing features offering the possibility of potentially new
applications, e.g. in quantum information sciences. Major advances have
been made in both theoretical and experimental investigations of the
nature and behavior of quantum phases and transitions in cooperatively
interacting many-body quantum systems.
For modeling purposes, most of the current innovative and successful
research in this field has been obtained by either directly or
indirectly using the insights provided by quantum (or transverse field)
Ising models because of the separability of the cooperative interaction
from the tunable transverse field or tunneling term in the relevant
Hamiltonian. Also, a number of condensed matter systems can be modeled
accurately in this approach, hence granting the possibility to compare
advanced models with actual experimental results.
This work introduces these quantum Ising models and analyses them both
theoretically and numerically in great detail. With its tutorial
approach the book addresses above all young researchers who wish to
enter the field and are in search of a suitable and self-contained text,
yet it will also serve as a valuable reference work for all active
researchers in this area.