In contrast to classical systems, actual implementation of non-Hermitian Hamiltonian
dynamics for quantum systems is a challenge because the processes of energy gain and …

The class of two-interacting-qubit spin–boson models with vanishing transverse fields on the
spin-pair is studied. The model can be mapped exactly into two independent standard single …

We study a generic time-dependent Jaynes–Cummings model, discovering universal
features of its time evolution on a dynamical time scale which is here defined as an integral …

The occurrence of a second-order superradiant quantum phase transition is brought to light
in a quantum system consisting of two interacting qubits coupled to the same quantized field …

We report the step-by-step construction of the exact, closed and explicit expression for the
evolution operator U (t) of a localized and isolated qubit in an arbitrary time-dependent field …

In this paper, we consider the thermal bath Lindblad master equation to describe the
quantum nonunitary dynamics of quantum states in a multi-mode bosonic system. For the …

We describe the behaviour of quantum entanglement and quantum steering of the Gaussian
states of two bosonic modes, each one placed in its own noisy environment. The dynamics …

This paper presents a two-qubit model derived from an SU (2)-symmetric 4× 4 Hamiltonian.
The resulting model is physically significant and, due to the SU (2) symmetry, is exactly …

Quantum coherence and quantum correlations are studied in the strongly interacting system
composed of two qubits and an oscillator with the presence of a parametric medium. To …

We employ a rescaled version of the geometric measure of quantum discord, based on the
Hilbert-Schmidt norm, to calculate it in the steady-state for a concrete system formed of a …