A5059166989- Quantum Information and Cryptography
- Quantum many-body systems
- Quantum chaos and dynamical systems
- Quantum Mechanics and Non-Hermitian Physics
- Quantum Computing Algorithms and Architecture
- Quantum and electron transport phenomena
- Quantum Mechanics and Applications
- Theoretical and Computational Physics
- Physics of Superconductivity and Magnetism
- Neural Networks and Reservoir Computing
- Quantum, superfluid, helium dynamics
- Spectroscopy and Quantum Chemical Studies
- Advanced Thermodynamics and Statistical Mechanics
Ludong University
2022-2024
Beijing Normal University
2022-2024
Institute of Theoretical Physics
2022-2023
Qufu Normal University
2018
Non-Hermitian spin systems have attracted extensive interest due to their unconventional magnetic properties, rich entanglement resources, and unusual quantum criticality phenomena. In this paper, based on the exact solution of a one-dimensional non-Hermitian spin-1/2 XY model with rotation-time-reversal ($\mathcal{RT}$) symmetry [X. Z. Zhang et al., Phys. Rev. A 87, 012114 (2013)], we study ground-state energy density, magnetization, correlation functions, entanglement, in...
In this paper, we investigate the crossover behaviors of entanglement and return probability at critical point in one-dimensional XXZ model by quantum renormalization group method. Two types quench protocols (A) adding interaction term z spin direction suddenly (B) rotating all even spins π about are considered to drive dynamics system, respectively. The dynamical closely related initial state under two protocols, especially N→∞. For left point, probabilities eventually approach one both...
The spin-12 three-leg antiferromagnetic Heisenberg spin ladder is studied under open boundary condition (OBC) and cylinder (CBC), using the density matrix renormalization group product state methods, respectively. Specifically, we calculate energy density, entanglement entropy, concurrence while discussing effects of interleg interaction J2 alternating coupling parameter gamma on these quantities. It found that introduction can completely reverse distribution between odd even bonds. Under...
In this manuscript, we study the non-Hermitian spin-1/2 XY model in presence of alternating, imaginary and transverse magnetic fields. For two-site spin system, solve exactly energy spectrum phase diagram, also calculate ground-state thermal entanglements by using concept concurrence. It is found that concurrence eigenstate which only depends on field {\eta} always equal to one region PT symmetry, while it decreases with PT-symmetric broken region. Especially, shows non-analytic behavior at...
In this paper, the spin ladder consisting of two antiferromagnetic Heisenberg legs is investigated by means density matrix renormalization group method with its product state form. The energy and bipartite entanglement measured concurrence are calculated, effects interleg couplings open boundary condition on distributions discussed in detail when ferro- antiferromagnetic, respectively. We found that entanglements mainly distributed diagonals ferromagnetic rungs antiferromagnetic....
The mixed spin-(1/2, 5/2) Ising-<i>XXZ</i> model on quasi-one-dimensional lattices can be used to study the properties of some materials (such as heterotrimetallic Fe-Mn-Cu coordination polymer), and this is beneficial practical applications such in field quantum information. coherence mutual information are calculated by transfer matrix method, effects Ising interaction, temperature magnetic them discussed. results show that decreases gradually with increase interaction at...