A5008145093- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Physics of Superconductivity and Magnetism
- Magnetic properties of thin films
- Quantum Information and Cryptography
- Topological Materials and Phenomena
- Quantum Mechanics and Applications
- Quantum and electron transport phenomena
- Strong Light-Matter Interactions
- Quantum Computing Algorithms and Architecture
- Quantum many-body systems
- Spectroscopy and Laser Applications
- Quantum optics and atomic interactions
- Magnetic Properties and Applications
- Theoretical and Computational Physics
- Metamaterials and Metasurfaces Applications
- Fluid Dynamics and Turbulent Flows
- Random Matrices and Applications
- Laser-Plasma Interactions and Diagnostics
- Magneto-Optical Properties and Applications
- Advanced Physical and Chemical Molecular Interactions
- 2D Materials and Applications
- Heusler alloys: electronic and magnetic properties
- Material Dynamics and Properties
- Magnetic Field Sensors Techniques
Anhui University
2018-2024
Fudan University
1993-2023
State Key Laboratory of Surface Physics
2018-2023
Shenzhen University
2020
University of Hong Kong
2018-2019
City University of Hong Kong, Shenzhen Research Institute
2018-2019
Shanghai University
2012
University of Delaware
2004-2008
Seagate (United States)
2005
Abstract Direct measurement of entanglement is an efficient method for obtaining the degree without full reconstruction quantum state. But most current direct schemes are designed states in specific physical systems, and not universal different systems. So, this paper, we want to design a algorithm two-qubit states, where means that does depend on Although conventional walk (QW) model have property, find by introducing auxiliary qubits CNOT gates circuits, generalized QW can be realized any...
The boundary element method is applied to investigate the optical forces when whispering gallery modes (WGMs) are excited by a total internally reflected wave. Such evanescent wave particularly effective in exciting high-Q WGM, while low angular or high radial order suppressed relatively. This results large contrast between on and off resonance, thus allows for size selectivity. We fully incorporate prism-particle interaction found that force behaves differently at different separations....
The small magnitude of (${\mathit{T}}_{\mathit{c}}$-${\mathit{T}}^{\mathrm{*}}$)/${\mathit{T}}_{\mathit{c}}$, where ${\mathit{T}}_{\mathit{c}}$ is the nematic-isotropic phase transition temperature and ${\mathit{T}}^{\mathrm{*}}$ denotes virtual temperature, has been a long-standing puzzle in physics liquid crystals. We show that by extending mean field theory to include isotropic, density-dependent component molecular interaction magnitudes both...
Abstract Three-dimensional(3D) Weyl semimetal(WSM) with linear energy spectra has attracted significant interest. Especially they have been observed experimentally in several solid materials the breaking of inversion symmetry. Here we predict a new family particle-hole( $${\mathscr{C}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>C</mml:mi> </mml:math> ) invariant 2D WSMs non-Abelian gauge field, which can emerge low bands being close to Fermi (dubbed Weyl-I) and high...
We have theoretically studied the magnetization behavior in magnetic trilayer nanostructures under influence of spin-transfer torque using Landau-Lifshitz-Gilbert equation. The focus is large angle dynamic precession mode film plane that can be induced and sustained by spin current certain circumstance although Gilbert damping present. Based on study, recent experimental observations microwave oscillation its characteristics well explained origin, which controversy, understood.
We predict that when light is reflected off a magnetic photonic crystal (MPC) there grazing component parallel to the surface; magnitude of this can be changed by an external field. The direction reversed as magnetization reversed. This provides way probe states with macroscopic circulations inside MPC.
In this paper, we investigate systematically the Mott-insulator-Superfluid quantum phase transitions for ultracold scalar bosons in triangular, hexagonal, as well Kagom\'e optical lattices. With help of field-theoretical effective potential, by treating hopping term Bose-Hubbard model perturbation, calculate boundaries analytically different integer filling factors. Our analytical results are good agreement with recent numerical results.
We studied the response of a ferromagnet--insulator--normal metal tunnel structure under an external oscillating radio frequency (rf) magnetic field. The dc voltage across junction is calculated and found not to decrease despite high resistance junction; instead, it order $1--100\phantom{\rule{0.3em}{0ex}}\ensuremath{\mu}\mathrm{V}$, much larger than experimentally observed value $(100\phantom{\rule{0.3em}{0ex}}\mathrm{nV})$ in ``strongly coupled'' Ohmic ferromagnet--normal bilayers. This...
Starting from crystal, electronic and magnetic structures of Heusler compounds, this paper studies the new topological materials related to compounds their properties, such as anomalous Hall effect, skyrmions, chiral anomaly, Dirac fermion, Weyl transverse Nernst thermoelectric thermal spintronics surface states. It can be discovered that state compound well protected due its high symmetry, thus producing rich properties. belonged semimetals usually have strong with doping or Anomalous...
Although Weyl semimetals have been extensively studied for exploring rich topological physics, the direct observation of celebrated chiral magnetic effect (CME) associated with so-called dipolar anomaly has long intrigued and challenged physicists, still remaining elusive in nature. Here we propose a feasible scheme experimental implementation ultracold atoms that may enable us to probe CME pure current an artificial semimetal. The paired points emerge presence well-designed spin-orbital...
In this paper, by treating the hopping parameter in Bose-Hubbard model as a perturbation, with help of re-summed Green's function method and cumulants expansion, momentum distribution ultra-cold Bose system triangular optical lattice is calculated analytically. By utilizing it, time-of-flight absorption picture plotted corresponding visibility determined. The comparison between our analytical results experimental data from Ref.[4] exhibits qualitative agreement.
Dipolar parity anomaly can be induced by spatiotemporally weak-dependent energy-momentum separation of paired Dirac points in two-dimensional semimetals. Here we reveal topological currents arising from this kind anomaly. A corresponding lattice model is proposed to emulate the using two-component ultracold atoms a optical Raman lattice. In our scheme, generated varying on-site coupling between two atomic components time and tuned via laser fields. Moreover, show that particle directly...
We study two-component (or pseudospin-1/2) bosons with pair hopping interactions in synthetic dimension, for which a feasible experimental scheme on square optical lattice is also presented. Previous studies have shown that on-site interspecies interaction can only generate nontrivial paired superfluid (super-counter-fluidity or pair-superfluid) state. In contrast, apart from superfluid, we reveal two new phases by considering this additional interaction. These novel are intraspecies...
Hyperentanglement has a higher information density than conventional single-degree-of-freedom entanglement, which attracted much attention due to its fascinating applications in quantum communication. However, since the inevitable interactions between entangled systems and environment will drive hyperentangled into less states or even mixed states, efficiency security of communication be greatly depressed. The currently existing distillation protocols are not universal, i.e., they only work...
Abstract We study the two-dimensional Bose-Fermi mixture on square lattice at finite temperature by using determinant quantum Monte Carlo method within weakly interacting regime. Here we consider attractive Bose-Hubbard model and free spinless fermions. In absence of boson-fermion interactions, obtain boundary collapsed state bosons. presence an effective p -wave interaction between fermions will be induced as far bosons are in a superfluid state. Moreover, find emergence composite fermion...
We propose two generalized Haldane models on laser-coupling optical lattices. Laser-assisted nearest neighbour tunnelings generate artificial staggered magnetic flux, facilitating the realization of topological nontrivial band structures. As generalizations model, these support insulator and semimetal phases featuring high Chern numbers. show simple rules for computing numbers our display phase diagrams. Moreover, numerical calculations energy spectra are in perfect agreement with...
Abstract To efficiently complete quantum information processing tasks, neural networks (QNNs) should be introduced rather than the common classical networks, but QNNs in current noisy intermediate-scale era cannot perform better because of scale and efficiency limits. So if properties can into more efficient may constructed for tasks field information. Complex numbers play an indispensable role standard theory, constitute important feature theory. complex are they outperform dealing with...
The cluster Gutzwiller method is widely used to study the strongly correlated bosonic systems, owing its ability provide a more precise description of quantum fluctuations. However, utility limited by exponential increase in computational complexity as size grows. To overcome this limitation, we propose an artificial intelligence-based known $\Delta$-Learning. This approach constructs predictive model learning discrepancies between lower-precision (small sizes) and high-precision (large...
Materials hosting flat electronic bands are a central focus of condensed matter physics as promising venues for novel ground states. Two-dimensional (2D) geometrically frustrated lattices such the kagome, dice, and Lieb attractive targets in this direction, anticipated to realize perfectly bands. Synthesizing these special structures, however, poses formidable challenge, exemplified by absence solid-state materials realizing dice lattices. An alternative route leverages atomic orbitals...