Nonadiabatic landau–zener–stückelberg–majorana transitions, dynamics, and interference

V Ivakhnenko, SN Shevchenko, F Nori - Physics Reports, 2023‏ - Elsevier
Since the pioneering works by Landau, Zener, Stückelberg, and Majorana (LZSM), it has
been known that driving a quantum two-level system results in tunneling between its states …

Ergotropy and capacity optimization in Heisenberg spin-chain quantum batteries

A Ali, S Al-Kuwari, MI Hussain, T Byrnes, MT Rahim… - Physical Review A, 2024‏ - APS
This study examines the performance of finite spin quantum batteries (QBs) using
Heisenberg XX, XY, XXZ, and XYZ spin models with Dzyaloshinsky-Moriya (DM) and Kaplan …

Quantum phase transitions for an integrable quantum Rabi-like model with two interacting qubits

R Grimaudo, ASM de Castro, A Messina, E Solano… - Physical Review Letters, 2023‏ - APS
A two-interacting-qubit quantum Rabi-like model with vanishing transverse fields on the
qubit pair is studied. Independently of the coupling regime, this model can be exactly and …

[HTML][HTML] Controlling the charge-transfer dynamics of two-level systems around avoided crossings

A Migliore, A Messina - The Journal of Chemical Physics, 2024‏ - pubs.aip.org
Two-level quantum systems are fundamental physical models that continue to attract
growing interest due to their crucial role as a building block of quantum technologies. The …

Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model

R Grimaudo, D Valenti, A Sergi, A Messina - Entropy, 2023‏ - mdpi.com
A spin-boson-like model with two interacting qubits is analysed. The model turns out to be
exactly solvable since it is characterized by the exchange symmetry between the two spins …

Coupled quantum pendula as a possible model for Josephson-junction-based axion detection

R Grimaudo, D Valenti, G Filatrella, B Spagnolo… - Chaos, Solitons & …, 2023‏ - Elsevier
The model of two coupled quantum pendula is studied and its suitability to describe
Josephson junctions interacting with axions is analysed. It is shown that some physical …

[HTML][HTML] Two-qubit entanglement generation through non-Hermitian Hamiltonians induced by repeated measurements on an ancilla

R Grimaudo, A Messina, A Sergi, NV Vitanov… - Entropy, 2020‏ - mdpi.com
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 …

Analytically solvable Hamiltonian in invariant subspaces

ASM de Castro, R Grimaudo, D Valenti… - The European Physical …, 2023‏ - Springer
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 …

Invariant-Parameterized Exact Evolution Operator for SU(2) Systems with Time-Dependent Hamiltonian

H Nakazato, A Sergi, A Migliore, A Messina - Entropy, 2023‏ - mdpi.com
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 …

Dzyaloshinskii-Moriya and dipole-dipole interactions affect coupling-based Landau-Majorana-Stückelberg-Zener transitions

R Grimaudo, H Nakazato, A Messina, NV Vitanov - Physical Review Research, 2020‏ - APS
It has been theoretically demonstrated that two spins (qubits or qutrits), coupled by
exchange interaction only, undergo a coupling-based joint Landau-Majorana-Stückelberg …