Switchable superradiant phase transition with Kerr magnons

G Liu, W **ong, ZJ Ying - Physical Review A, 2023‏ - APS
The superradiant phase transition (SPT) has been widely studied in cavity quantum
electrodynamics (CQED). However, this SPT is still subject to ongoing debates due to the no …

Robust Topological Feature against Non‐Hermiticity in Jaynes–Cummings Model

ZJ Ying - Advanced Quantum Technologies, 2024‏ - Wiley Online Library
Abstract The Jaynes–Cummings Model (JCM) is a fundamental model and building block for
light‐matter interactions, quantum information and quantum computation. The present work …

Quantum Fisher information and polaron picture for the identification of transition coupling in the quantum Rabi model

ZJ Ying, WL Wang, BJ Li - Physical Review A, 2024‏ - APS
The quantum Rabi model (QRM) is a fundamental model for light-matter interactions. A
fascinating feature of the QRM is that it manifests a quantum phase transition which is …

Spin winding and topological nature of transitions in the Jaynes-Cummings model with Stark nonlinear coupling

ZJ Ying - Physical Review A, 2024‏ - APS
Besides exploring novel transition patterns, acquiring a full understanding of the transition
nature is an ultimate pursuit in studies of phase transitions. The fundamental models of light …

[HTML][HTML] Characterization of Quantum and Classical Critical Points for an Integrable Two-Qubit Spin–Boson Model

R Grimaudo, A Messina, H Nakazato, A Sergi… - Symmetry, 2023‏ - mdpi.com
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 …

Thermodynamic limit in the two-qubit quantum Rabi model with spin-spin coupling

R Grimaudo, G Falci, A Messina, E Paladino… - Physical Review …, 2024‏ - APS
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 …

Generalization of the Schrödinger equation for open systems based on the quantum-statistical approach

KG Zloshchastiev - Universe, 2024‏ - mdpi.com
Within the framework of the quantum-statistical approach, utilizing both non-Hermitian
Hamiltonian and Lindblad's jump operators, one can derive various generalizations of the …

[HTML][HTML] Time-Irreversible Quantum-Classical Dynamics of Molecular Models in the Brain

A Sergi, A Messina, R Saija, G Martino, MT Caccamo… - Symmetry, 2025‏ - mdpi.com
This manuscript aims to illustrate a quantum-classical dissipative theory (suited to be
converted to effective algorithms for numerical simulations) within the long-term project of …

Universal Quantum Fisher Information and Simultaneous Occurrence of Landau‐Class and Topological‐Class Transitions in Non‐Hermitian Jaynes‐Cummings …

ZJ Ying - Advanced Quantum Technologies, 2024‏ - Wiley Online Library
Light‐matter interactions provide an ideal testground for interplay of critical phenomena,
topological transitions, quantum metrology, and non‐Hermitian physics with high …

Upgrading Quantum Metrology by Combined Sensitivity Resources in Mixed Linear-Nonlinear Light-Matter Interactions with Bias Field

ZJ Ying - arxiv preprint arxiv:2502.04466, 2025‏ - arxiv.org
The major goal of quantum metrology (QM) is to exploit the quantum resources to raise the
measurement precision (MP) as high as possible. When the quantum resources such as …