A5101397975- Physics of Superconductivity and Magnetism
- Quantum many-body systems
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Condensed Matter Physics
- Theoretical and Computational Physics
- Quantum, superfluid, helium dynamics
- Topological Materials and Phenomena
- Quantum and electron transport phenomena
- Quantum Mechanics and Non-Hermitian Physics
- Algebraic structures and combinatorial models
- Advanced Thermodynamics and Statistical Mechanics
- Spectroscopy and Quantum Chemical Studies
- Quantum optics and atomic interactions
- Advanced NMR Techniques and Applications
- Advanced Fiber Laser Technologies
- Strong Light-Matter Interactions
- Color perception and design
- Microwave Engineering and Waveguides
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Magnetic properties of thin films
- High-pressure geophysics and materials
- Magnetic and transport properties of perovskites and related materials
- Particle accelerators and beam dynamics
- Geomagnetism and Paleomagnetism Studies
Beijing Computational Science Research Center
2021-2025
Beijing Normal University
2023-2025
Nanchang University
2023-2024
Nanjing University of Aeronautics and Astronautics
2023
Xinjiang University
2022-2023
Wuhan University
2023
Tongji University
2022
University of Kaiserslautern
2015-2020
Max Planck Institute for the Physics of Complex Systems
2014
Renmin University of China
2009-2011
We study the spin liquid candidate of spin-1/2 J1−J2 Heisenberg antiferromagnet on triangular lattice by means density matrix renormalization group (DMRG) simulations. By applying an external Aharonov-Bohm flux insertion in infinitely long cylinder, we find unambiguous evidence for gapless U(1) Dirac behavior. The overcomes finite size restriction energy gaps and clearly shows behavior at expected wave vectors. Using DMRG transfer matrix, low-lying excitation spectrum can be extracted, which...
The natural mineral azurite Cu(3)(CO(3))(2)(OH)(2) is a frustrated magnet displaying unusual and controversially discussed magnetic behavior. Motivated by the lack of unified description for this system, we perform theoretical study based on density functional theory as well state-of-the-art numerical many-body calculations. We propose an effective generalized spin-1/2 diamond chain model which provides consistent experiments: low-temperature magnetization, inelastic neutron scattering,...
The natural mineral azurite Cu3(CO3)2(OH)2 is an interesting spin-1/2 quantum antiferromagnet. Recently, a generalised diamond chain model has been established as good description of the magnetic properties with parameters placing it in highly frustrated parameter regime. Here we explore further this for azurite. First, determine inelastic neutron scattering spectrum absence field and find agreement experiments, thus lending support to model. Furthermore, present numerical data...
Motivated by a recent experiment on the rare-earth material ${\mathrm{YbMgGaO}}_{4}$ [Y. Li et al., Phys. Rev. Lett. 115, 167203 (2015)], which found that ground state of is quantum spin liquid, we study ground-state phase diagram an anisotropic spin-$1/2$ model was proposed to describe ${\mathrm{YbMgGaO}}_{4}$. Using density matrix renormalization-group method in combination with exact-diagonalization method, calculate variety physical quantities, including energy, fidelity, entanglement...
The Haldane-Hubbard model is a prime example of the combined effects band topology and electronic interaction. We revisit its spinful phase diagram at half filling as consensus on presence SU(2) symmetry currently lacking. To start, we utilize Hartree-Fock mean-field method, which offers direct understanding breaking through effective mass term that can acquire spin dependence. Our results, in agreement with previous studies, provide an instructive insight into regime where Chern number...
The Gaussian transition in the spin-1 Heisenberg chain with single-ion anisotropy is extremely difficult to treat, both analytically and numerically. We introduce an improved density-matrix renormalization group procedure strict error control, which we use access very large systems. By considering bulk entropy, determine point four-digit accuracy, ${D}_{c}/J=0.968\phantom{\rule{0.16em}{0ex}}45(8)$, resolving a long-standing debate quantum magnetism. With this value, obtain high-precision...
We investigate the ground-state phase diagram of spinful extended Haldane-Hubbard model on honeycomb lattice using an exact-diagonalization, mean-field variational approach, and further complement it with infinite density matrix renormalization group, applied to cylinder. This model, governed by both on-site nearest-neighbor interactions, can result in two types insulators finite local order parameters, either spin or charge ordering. Moreover, a third one, topologically nontrivial insulator...
The reduced density matrix (RDM) plays a key role in quantum entanglement and measurement, as it allows the extraction of almost all physical quantities related to degrees freedom. However, restricted by freedom environment, total system size is often limited, let alone subsystem. To address this challenge, we propose Monte Carlo scheme with low technical barrier, enabling precise RDM. demonstrate power method, present fine levels spectrum (ES), which logarithmic eigenvalues We clearly show...
The results from a model of kinetic Alfvén waves which includes varying magnetic field and density show that time‐dispersed bursts auroral electrons can be accelerated by wave pulses propagating the magnetosphere to ionosphere. modeled electron signatures have similar energy range temporal structure those observed on sounding rockets satellites suggesting time dispersion is generated waves.
Analysis of the vibration reduction characteristics shock absorbers is crucial for engines. In this study, fractal theory was applied to contact surface an under-platform damper (UPD), and influence excitation force in same opposite directions on roughness studied. First, based geometry (FGT), characterization method a UPD proposed. Then, friction mechanical model rough established by combining it with 3D model. Furthermore, finite element dynamic blade structure set up. Next, harmonic...
We investigate the extended hard-core Bose-Hubbard model on triangular lattice as a function of spatial anisotropy with respect to both hopping and nearest-neighbor interaction strength. At half-filling system can be tuned from decoupled one-dimensional chains two-dimensional solid phase alternating density order by adjusting anisotropic coupling. intermediate anisotropy, however, frustration effects dominate an incommensurate supersolid emerges, which is characterized well superfluid...
One-dimensional gapped phases that avoid any symmetry breaking have drawn enduring attention. In this paper, we study such in a bond-alternating spin-1 $K$-$\Gamma$ chain built of Kitaev ($K$) interaction and an off-diagonal $\Gamma$ term. the case isotropic bond strength, Haldane phase, which resembles ground state spin-$1$ Heisenberg chain, is identified wide region. A phase situated at dominant ferromagnetic antiferromagnetic limits also found. The has extremely short-range spin...
We study the evolution of magnetic structures driven by a synthetic spin-orbit coupling in one-dimensional two-component Bose-Hubbard model. In addition to Mott insulator-superfluid transition, insulator phases we found transition from gapped ferromagnetic phase gapless chiral increasing strength coupling. Further drives antiferromagnetic phase. These persist superfluid phases. particular, and phases, incommensurability is observed characteristic correlation functions. unconventional...
We study the effect of synthetic spin-orbit coupling in a two-component Bose-Hubbard model one dimension by employing density-matrix renormalization group method. A ferromagnetic long-range order emerges both Mott-insulator and superfluid phases resulting from spontaneous breaking ${Z}_{2}$ symmetry, when term becomes comparable to hopping kinetic energy intercomponent interaction is smaller than intracomponent as well. This expected be detectable with present realization experiments.
We investigate the effect of Berry phase on quadrupoles that occur, for example, in low-energy description spin models. Specifically, we study here one-dimensional bilinear-biquadratic spin-one model. An open question many years about this model is whether it has a nondimerized fluctuating nematic phase. The dimerization recently been proposed to be related phases quantum fluctuations. use an effective calculate scaling according theory and then verify predictions using large scale...
We investigate the ground-state phase diagram of spinless Haldane-Hubbard model in presence quenched disorder, contrasting results obtained from both exact diagonalization and density matrix renormalization group, applied to a honeycomb cylinder. The interplay interactions, topology gives rise rich and, particular, highlights possibility disorder-driven trivial-to-topological transition finite interactions. That is, topological Anderson insulator, demonstrated noninteracting settings, is...
Kitaev-type spin chains have been demonstrated to be fertile playgrounds in which exotic phases and unconventional phase transitions are ready appear. In this work, we use the density-matrix renormalization-group method study quantum diagram of a spin-1 Kitaev chain with tunable negative single-ion anisotropy (SIA). When strength SIA is small, ground state revealed spin-nematic phase, escapes conventional magnetic order but characterized by finite correlation because breaking spin-rotational...
A biorthonormal-block density-matrix renormalization group algorithm is proposed to compute properties of non-Hermitian many-body systems, in which a structured low-rank approximation reduced density matrix implemented fulfill the prerequisite for biorthonormality transformation and optimally construct saved space as well. redundancy assigned exploited reduce condition number resulting from left right matrices, thus ensuring numerical stability procedure. The successfully applied an...
Abstract The application of the eigenstate thermalization hypothesis to non-Hermitian quantum systems has become one most important topics in dissipative chaos, recently giving rise intense debates. process is intricate, involving many time-evolution trajectories reduced Hilbert space system. By considering two different expansion forms density matrices adopted biorthogonal and right-state time evolutions, we derive versions Gorini–Kossakowski–Sudarshan–Lindblad (GKSL) master equations...