Excited-state quantum phase transitions (ESQPTs) are critical phenomena that generate
singularities in the spectrum of quantum systems. For systems with a classical counterpart …

Eigenlevel correlation diagrams has proven to be a very useful tool to understand eigenstate
characteristics of classically chaotic systems. In particular, we showed in a previous …

The statistical properties of the dynamics of energy levels are investigated in the case of two
two-dimensional disordered quantum dot models with nearest-neighbor hopping subjected …

We address parameter estimation in two-level systems exhibiting level anticrossing and
prove that universally optimal strategies for parameter estimation may be designed. In fact …

The phase space structure of a generic Hamiltonian model, describing the vibrational
dynamics of the LiNC/LiCN molecular system, is studied using a frequency analysis method …

Control of chemical reactions using external electric fields: The case of the LiNC ⇌ LiCN
isomerization - ScienceDirect Skip to main contentSkip to article Elsevier logo Journals & Books …

Shannon entropy is studied for the series of avoided crossings that characterize the
transition from order to chaos in quantum mechanics. In order to be able to study jointly this …

Correlation diagrams of energy levels using ℏ as the varying parameter have proven very
useful in the characterization of quantum vibrational dynamics of small polyatomic …

A new implementation of the EBK method for the semiclassical quantization of partially
destroyed tori is presented. The application to the calculation of some quantum states of the …

The present study focuses on the investigation of the linear and nonlinear optical properties
corresponding to electronic transitions in the vicinity of Level Anti-Crossing (LAC) points …