The Husimi distribution is proposed for a phase-space analysis of quantum phase
transitions in the Dicke model of spin-boson interactions. We show that the inverse …

We present a phase-space study of first-, second-and third-order quantum phase transitions
in the Lipkin–Meshkov–Glick model by means of the Husimi function. By analyzing the …

It is shown that there is a linear relation between the relative Rényi entropy and the density
functional fidelity susceptibility. The derivative of the relative Rényi entropy with respect to …

Fluctuations of Hamiltonian eigenfunctions, measured by the inverse participation ratio
(IPR), turn out to characterize topological-band insulator transitions occurring in 2D Dirac …

Rényi uncertainty relations are shown to have significant importance in quantum phase
transitions. They detect the quantum phase transition in the Dicke model. The Rényi entropy …

The Husimi distribution is proposed for a phase-space analysis of quantum phase
transitions in the two-dimensional U (3) vibron model for N-size molecules. We show that the …

We propose coherent ('Schrödinger cat-like') states adapted to the parity symmetry providing
a remarkable variational description of the ground and first excited states of vibron models …

Uncertainty relations are studied for a characterization of topological-band insulator
transitions in 2D gapped Dirac materials isostructural with graphene. We show that the …

We analyze the structure of low energy Hamiltonian eigenstates in zincblende
heterostructures (like HgTe/CdTe quantum wells) near the gamma point, under magnetic …

We propose a method to identify the order of a quantum phase transition by using area
measures of the ground state in phase space. We illustrate our proposal by analyzing the …