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] 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 …

Construction of Non-Hermitian Parent Hamiltonian from Matrix Product States

R Shen, Y Guo, S Yang - Physical Review Letters, 2023 - APS
There are various research strategies used for non-Hermitian systems, which typically
involve introducing non-Hermitian terms to preexisting Hermitian Hamiltonians. It can be …

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 …

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 …

Greenberger‐Horne‐Zeilinger‐state Generation in Qubit‐Chains via a Single Landau‐Majorana‐Stückelberg‐Zener π/2‐pulse

R Grimaudo, NV Vitanov… - Fortschritte der …, 2022 - Wiley Online Library
A protocol for generating Greenberger‐Horne‐Zeilinger states in a system of NN coupled
qubits is proposed. The Hamiltonian model assumes NN‐wise interactions between the NN …

Imbalanced spin-wave excitation on the exceptional line induced by anti- symmetry breaking in a ferromagnetic trilayer system

Y Pan, VL Grigoryan, J Yang, K **a - Physical Review B, 2023 - APS
We investigate the pseudo-Hermitian properties of a ferromagnet| normal-metal|
ferromagnet heterojunction, where the two ferromagnets are subjected to two independently …

Effective protection of quantum coherence by a non-Hermitian driving potential

KQ Huang, WL Zhao, Z Li - Physical Review A, 2021 - APS
We investigate the effects of non-Hermitian driving potential on quantum coherence in a
bipartite system. The results show that the dynamical localization will revive after being …

Entropic uncertainty for two coupled dipole spins using quantum memory under the Dzyaloshinskii–Moriya interaction

AN Khedr, ABA Mohamed, AH Abdel-Aty, M Tammam… - Entropy, 2021 - mdpi.com
In the thermodynamic equilibrium of dipolar-coupled spin systems under the influence of a
Dzyaloshinskii–Moriya (D–M) interaction along the z-axis, the current study explores the …

Multipartite correlations in quantum collision models

S Filippov - Entropy, 2022 - mdpi.com
Quantum collision models have proved to be useful for a clear and concise description of
many physical phenomena in the field of open quantum systems: thermalization …