In an attempt to theoretically investigate the quantum phase transition and criticality in
topological models, we study a Kitaev chain with longer-range couplings (finite number of …

We study the geometric Uhlmann phase of mixed states at finite temperature in a system of
two coupled spin-1 2 particles driven by a magnetic field applied to one of the spins. In the …

The introduction of Peierls phases in open tight-binding chains without closed paths in either
real or synthetic dimensions is understood to be physically inconsequential, as one …

We provide a natural generalization of a Riemannian structure, ie, a metric, recently
introduced by Sjöqvist for the space of nondegenerate density matrices, to the degenerate …

Geometric phase is an important tool to define the topology of the Hermitian and non-
Hermitian systems. Besides, the range of coupling plays an important role in realizing higher …

Long-range effects induce some interesting behavior and considered as a gateway to
understand the non-local behavior in the quantum systems. Especially, the long-range …