期刊：
Journal of Physics B: Atomic, Molecular and Optical Physics,2007年40(14):2827-2839 ISSN：0953-4075
通讯作者：
Ke, Sha-sha
作者机构：
[Ke, Sha-sha] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;Jianghan Univ, Dept Phys, Wuhan 430056, Peoples R China.
通讯机构：
[Ke, Sha-sha] H;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
The enhancement of the intracavity entanglement of a nonlinear coupler via homodyne-mediated quantum feedback is investigated. It is found that the feedback can effectively enhance the squeezing, entanglement and purity of a two-mode field in the nonlinear coupler by appropriately choosing the quadrature angle at which the quantum feedback is introduced.
作者：
Elssfah, E. M.*;Song, H. S.;Tang, C. C.;Zhang, J.;Ding, X. X.;...
期刊：
Materials Chemistry and Physics,2007年101(2-3):499-504 ISSN：0254-0584
通讯作者：
Elssfah, E. M.
作者机构：
[Ding, X. X.; Elssfah, E. M.; Song, H. S.; Tang, C. C.; Zhang, J.; Qi, S. R.] Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Elssfah, E. M.] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
关键词：
Ceramics;Nanostructures;X-ray diffraction
摘要：
Nanowires made of aluminum borate formed of Al18B4O33 have been synthesized in high yield by improving the traditional chemical flux method for the growth of aluminum borate with the fibrous structure. In this study, aluminum powder was added into the aluminum oxide and boron oxide reactants as an additive in order to control the morphology of the final products. The chemical method reported here is utilized to decrease the diameters of traditional aluminum borate fiber into nanoscale and to increase their lengths. The optimum experimental parameters and possible growth mechanism for the compound nanowires have been presented.
摘要：
Cu<sub>2</sub>O nanorods with extraordinary large surface area are synthesized by polyol method successfully. Their photocatalytic property is evaluated by the photodegradation of brilliant red dye under visible light irradiation. For comparison, Cu<sub>2</sub>O nanocubes are synthesized and evaluated with photocatalytic property as well. The results show that the photocatalytic activity of the Cu<sub>2</sub>O nanorods is more than one time higher than that for Cu<sub>2</sub>O nanocubes under visible light. Additionally, the structure of the Cu<sub>2</sub>O nanorods is very stable and they can not be oxidized to CuO even during the photocatalytic reaction process. It is noticeable that this kind of Cu<sub>2</sub>O nanorods has remarkable large surface areas 47.6 m<sup>2</sup>/g, which is about forty times as large as that for as-prepared Cu<sub>2</sub>O nanocubes and it is also three times larger than that for the reported porous Cu<sub>2</sub>O nanoparticles. The large surface area of Cu<sub>2</sub>O nanorods leads to its higher adsorption ability to the brilliant red dye and excellent high photocatalytic activity under visible light. Since Cu<sub>2</sub>O nanorods are very stable and have high photocatalytic activity under visible light, they are expected to be used in photocatalytic oxidation technology practically in the future.
关键词：
Jet quenching;Modified fragmentation;Parton energy loss
摘要：
Modifications to quark and antiquark fragmentation functions due to quark-quark (antiquark) double scattering in nuclear medium are studied systematically up to order O(alpha(2)(s)) in deeply inelastic scattering (DIS) off nuclear targets. At the order O(alpha(2)(s)), twist-four contributions from quark-quark (antiquark) rescattering also exhibit the Landau-Pomeranchuk-Migdal (LPM) interference feature similar to gluon bremsstrahlung induced by multiple parton scattering. Compared to quark-gluon scattering, the modification, which is dominated by t-channel quark-quark (antiquark) scattering, is only smaller by a factor of C-F/C-A = 4/9 times the ratio of quark and gluon distributions in the medium. Such a modification is not negligible for realistic kinematics and finite medium size. The modifications to quark (antiquark) fragmentation functions from quark-antiquark annihilation processes are shown to be determined by the antiquark (quark) distribution density in the medium. The asymmetry in quark and antiquark distributions in nuclei will lead to different modifications of quark and antiquark fragmentation functions inside a nucleus, which qualitatively explains the experimentally observed flavor dependence of the leading hadron suppression in semi-inclusive DIS off nuclear targets. The quark-antiquark annihilation processes also mix quark and gluon fragmentation functions in the large fractional momentum region, leading to a flavor dependence of jet quenching in heavy-ion collisions. (C) 2007 Elsevier B.V. All rights reserved.
摘要：
For the first time nanoporous Zn and Ni particles were synthesized in dimethyl sulphoxide (DMSO) by a sonoelectrochemical method. The as-prepared samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen sorption. It was found that these nanopores were produced by the aggregation and/or melting of primary nanoparticles of about 4–5 nm in size under ultrasound irradiation after electrochemical reduction of metal ions. The utilization of nonaqueous solvent prevented the oxidation of these active metal nanoparticles, while the presence of poly-(vinylpyrrolidone) could inhibit the growth of the nanoparticles. This study provides a general method to continuously prepare nanoporous active metal particles from inorganic metal salts with high yields.
期刊：
International Journal of Modern Physics E,2007年16(07n08):2363-2369 ISSN：0218-3013
通讯作者：
Jin, Meng
作者机构：
[Jin, Meng] Cent China Normal Univ, Inst Particle Phys, Wuhan 430070, Peoples R China.;[He, Lianyi; Zhuang, Pengfei] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
通讯机构：
[Jin, Meng] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430070, Peoples R China.
会议名称：
19th International Conference on Ultra-Relativistic Necleus-Nucleus Collisions
会议时间：
NOV 14-20, 2006
会议地点：
Shanghai, PEOPLES R CHINA
会议主办单位：
[Jin, Meng] Cent China Normal Univ, Inst Particle Phys, Wuhan 430070, Peoples R China.^[He, Lianyi;Zhuang, Pengfei] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China.
摘要：
We present a phase diagram for a fermion pairing system with density imbalance, including homogenous and inhomogeneous phases (LOFF and phase separation). The phase structure of neutron-proton condensate in isospin asymmetric nuclear matter is investigated as a realistic example.
作者机构：
[Chen, Ji-sheng] Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Yun Yang Teachers Coll, Dept Phys, Shi Yan 442700, Peoples R China.
通讯机构：
[Chen, Ji-sheng] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
Based on previous works, analytical calculational procedures for dealing with the strongly interacting fermion ground state are further developed through a medium-dependent potential in terms of the Bethe-Peierls contact interaction model. The methods are exact in the unitary limit regime and they lead to self-consistent equations analogous to the Hartree ones. The single particle energy spectrum rearrangement effects on the thermodynamics due to the Hugenholtz–van Hove theorem constraint are addressed. These effects lead to an additional instantaneous correlation potential contribution to the system physical chemical potential and pressure, i.e., equation of state, in order to enforce the classical thermodynamic consistency. The Dyson-Schwinger equations represent implicitly the various Bethe-Goldstone expansion ones. In a thermodynamically self-consistent way, the universal dimensionless factor is analytically calculated to be ξ=49, which defines the ratio of the unitary fermions energy density to that of the ideal noninteracting ones at T=0.
作者机构：
[Zhang, Hanzhong] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA.;Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
通讯机构：
[Zhang, Hanzhong] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
摘要：
Dihadron spectra in high-energy heavy-ion collisions are studied within the next-to-leading order perturbative QCD parton model with modified jet fragmentation functions due to jet quenching. High- pT back-to-back dihadrons are found to originate mainly from jet pairs produced close and tangential to the surface of the dense matter. However, a substantial fraction also comes from jets produced at the center with finite energy loss. Consequently, high- pT dihadron spectra are found to be more sensitive to the initial gluon density than the single hadron spectra that are more dominated by surface emission. A simultaneous χ2 fit to both the single and dihadron spectra can be achieved within a range of the energy loss parameter ϵ0=1.6–2.1 GeV/fm. Because of the flattening of the initial jet production spectra at s=5.5 TeV, high pT dihadrons are found to be more robust as probes of the dense medium.
摘要：
For a UWB pyramidal horn antenna with a curved ridge and a fin, the effect of the resistors at the end of the fin on reflection coefficient or return loss is investigated. The results from both simulation and experiment show that it is a very important factor on its performance that these termination resistors well match the impedance at the antenna's end.
