Zhong-Qiang LiuQufu Normal University · Physics Department
Zhong-Qiang Liu
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28
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Publications
Publications (28)
Quantum entanglement and correlations in the spin-1 Heisenberg chain with single-ion anisotropy are investigated using the quantum renormalization group method. Negativity and quantum discord are calculated with different anisotropy parameters △ and single-ion anisotropy parameters D. We focus on the relations between two abovementioned physical qu...
Quantum entanglement and quantum phase transition of the spin-1 Heisenberg chain with single-ion anisotropy have been investigated by using the quantum renormalization group method. It is found that the quantum entanglement of the system tends to different saturated values and exhibits perfect step-like plateaus in each phase separated by the criti...
The dynamics of entanglement in the one-dimensional spin-1/2 anisotropic XXZ model is studied using the quantum renormalization-group method. We obtain the analytical expression of the concurrence, for two different quenching methods, it is found that initial state plays a key role in the evolution of system entanglement, i.e., the system returns c...
Employing the correlation matrix technique, the spatial distribution of thermal energy in two-dimensional triangular lattices in equilibrium, interacting with linear springs, is studied. It is found that the spatial distribution of thermal energy varies with the included angle of the springs. In addition, the average thermal energy of the longer sp...
Adopting concurrence as entanglement measure, we study entanglement and quantum phase transition of the Ising spin systems on the triangular lattice and Sierpiński fractal lattices by using the quantum renormalization-group method. It is found that the ground-state entanglement between two spins (or spin blocks) depends on the following factors: th...
The dynamics of the random Ising spin chain in coexisting transverse and longitudinal magnetic fields is studied by the recursion method. Both the spin autocorrelation function and its spectral density are investigated by numerical calculations. It is found that system’s dynamical behaviors depend on the deviation of the random exchange coupling be...
We study interfacial water by a novel method we examine its stabilization in bulk water. Our study evidences that in an iterative immersion process [placing a hydrophilic membrane (Nafion®) in ultra-pure Milli-Q water kept in a plastic Petri capsule, manual agitations causing the liquid to lap against the membrane, removal and drying of the membran...
The geometrically frustrated spin-1 Blume-Capel model on an infinite sawtooth chain is exactly solved by the transfer matrix method. The magnetization, ground-state phase diagram, magnetocaloric properties, and specific heat of the system are investigated. The results indicate that: (i) Magnetization plateaus appear at zero temperature. Their numbe...
The quantum entanglement and quantum phase transition of the transverse-field Ising model on a two-dimensional square lattice were investigated by applying the quantum renormalization group method. The quantum critical point (QCP) and the correlation length exponent, , were obtained. By taking the concurrence as a measure of entanglement, the entan...
Molecular associates in very dilute solutions of weak electrolytes or non-electrolytes kept at ambient conditions are studied. Ambient electromagnetic fields affect some of the associates’ types. For concentrations (C) in the range of about 10^-7 - 10^-20 M, the associates were observed only for solutions with polar solvents, e.g., water, chlorofor...
Molecular associates in aqueous solutions of strong electrolytes are analyzed. The solutions’ concentrations (C) were in the range of 2 - 10^-20 M. Preparation of the solutions involved serial dilutions of a stock solution and vigorous shaking after each dilution step. Electromagnetic fields were observed to mediate formation of some associate type...
10^-7 - 10^-4 m sized molecular groupings in solutions are the foci of our research. The concentration of the solutions varies from 2 M to 10^-20 M. The solutions are prepared by serial dilutions of a stock solution with polar solvents (e.g., water) and vigorous shaking after each dilution step. Light scattering, dielectric permittivity, electric c...
Quantum phase transitions (QPT) in the infinite-long Ising-XXZ diamond chain, characterized by the quantum correlations measured by the quantum discord (QD) and the entanglement of formation (EoF), are investigated exactly by the transfer-matrix method. QD and EoF are calculated numerically for different values of anisotropy parameter, external mag...
To explore the effects of NF-κB on proliferation of rat pulmonary artery smooth muscle cells (PASMC) inhibited by simvastatin.
PASMC isolated from rats and cultured in vitro were randomly divided into four groups (n=6 each): control, platelet-derived growth factor (PDGF) treatment, PDGF+simvastatin treatment, and PDGF+simvastatin+parthenolide (NF-κ...
We investigate the quantum correlation measured by quantum discord (QD) for thermalized ferromagnetic Heisenberg spin systems in one-dimensional chains and on fractal lattices using the decimation renormalization group approach. It is found that the QD between two non-nearest-neighbor end spins exhibits some interesting behaviors which depend on th...
Slip-boundary effects on the polar liquid film motor (PLFM) -- a novel
micro-fluidic device with important implications for advancing knowledge on
liquid micro-film's structure, dynamics, modeling and technology -- are
studied. We develop a mathematical model, under slip boundary conditions,
describing electro-hydro-dynamical rotations in the PLFMs...
The density distribution of ultracold two-component fermionic gases 6Li, which are confined in a gradient magnetic field and a symmetrical double-well potential, is investigated by employing local-density approximation. It is found that three different regimes including quasi-molecular Bose—Einstein condensation (BECm), the dimers in the unitarity...
Liquid film motor as a novel experimental device will play an important role in basic research and technology applications. Indepth theoretical studies on its electro-hydrodynamics (EHD) motions under various conditions are of great significance. In current paper, the dynamical characteristics of the liquid film motor driven by a square-wave electr...
The "liquid film motor," a novel device with important implications for basic research and technology, is analyzed. It works perfectly with both direct current (dc) and alternating current (ac) fields. We develop a mathematical model describing electrohydrodynamical (EHD) motions induced by ac fields, which are more complex and have wider technolog...
Our study indicates suspended water films, driven by crossed square-wave electric fields, may act as “washers”, “centrifuges” and “mixers”. Based on our recent model successfully describing experimentally observed electro-hydrodynamical flows in water films, we derive conditions for generating specific rotational flows. Our main findings, which are...
Taking one-dimensional random transverse Ising model (RTIM) with the
double-Gaussian disorder for example, we investigated the spin autocorrelation
function (SAF) and associated spectral density at high temperature by the
recursion method. Based on the first twelve recurrants obtained analytically,
we have found strong numerical evidence for the lo...
To explore the influence of inhibiting Notch signal on pulmonary vascular remodeling induced by PDGF.
Vessel strips taken from healthy Wistar rats were cultured together with extrogenous PDGF, the potent smooth muscle cell proliferation stimulators, for 7 days. Some vessel strips were cultured with PDGF and gamma-secretase inhibitor DAPT, a Notch s...
Whether Simvastatin has beneficial effect on pulmonary artery hypertension (PAH) remains unclear. This study aimed to explore the effect of simvastatin on PAH and the underlying mechanism. Male SD rats were randomized into three groups: control group, PAH model group, and treatment group with the intervention of the Simvastatin (n = 10, each group)...
The paper presents a simple dynamical model to systemically explain the rotation mechanism of the liquid film motor reported by experiments. The field-induced-plasticity effect of the liquid film is introduced into our model, in which the liquid film in crossed electric fields is considered as a Bingham plastic fluid with equivalent electric dipole...
To identify the gene expression profiles associated with the apoptosis of pulmonary arterial smooth muscle cells stimulated by carbon monoxide (CO).
Primary cultured Sprague-Dawley rat pulmonary arterial smooth muscle cells (PASMC) were stimulated by platelet-derived growth factor (PDGF, 20 ng/mL) and hemin (20 μmol/L). Cells were harvested after 2...
The dynamics of the one-dimensional random transverse Ising model with both nearest-neighbor (NN) and next-nearest-neighbor (NNN) interactions is studied in the high-temperature limit by the method of recurrence relations. Both the time-dependent transverse correlation function and the corresponding spectral density are calculated for two typical d...
We investigate the dynamics of the random one-dimensional spin-1/2 quantum isotropic XY model in high-temperature limit by the recurrence relations method. Both the time-dependent transverse autocorrelation function and the corresponding spectral density are calculated for the cases that the exchange couplings between spins or transverse fields sat...
The effects of Gaussian disorder on the dynamics of the one-dimensional spin-1/2 random transverse Ising model are studied in the high-temperature limit by the recursion method. Both spin autocorrelation functions and the corresponding spectral densities are calculated for three types of disordered cases. It is found that when the standard deviatio...