Radial Excitations in the Global Colour Soliton Model

With the Munczek-Nemirovsky model of the effective gluon propagator in the global colour model, we study the radially excited solitons in which one quark is excited and the other two are at the ground state. The obtained masses of the two radial excitations are comparable with the experimental data.     

Nucleon—Nucleon Phase Shifts in the Extended Quark—Delocalization Colour—Screening Model

An alternative method is applied to the study of nocleon-nucleon scattering phase shifts within the framework of the extended quark delocalization colour-screening model,in which the one-pion exchange with short-range cutoff is included.     

Colour Dipole Picture for Deep Inelastic Scattering in the Collinear Factorization Scheme

The colour dipole picture for deep inelastic scattering processes is generalized in the collinear factorization scheme.We show that a duality between the colour dipole picture and scattering picture is lost in higher twist amplitudes.     

A “Dipole–Induced Dipole” Quantum Model and the Effect of an Inert Environment on the Intensity of Infrared Absorption

Optics and Spectroscopy - A theory of the imaginary part of isotropic polarizability induced by dipole–dipole interactions between isotropically polarizable particles has been developed on...     

Dipole—Dipole Interaction and the Directional Motion of Brownian

The electric field of the microtubule is calculated according to its dipole distribution.The conformational change of a molecular motor is described by the rotation of a dipole which interacts with the microtubule.The numerical simulation for the particle currend shows that this interaction helps to produce a directional motion along the microtubule.And the average displacement executes step changes that resemble the experimental result for kinesin motors.     

Diquark Structure of Pentaquark in the Quark Delocalization Colour Screening Model

In the framework of quark-delocalization, colour-screening model, the diquark structure of pentaquark θ^＋ is studied in detail under the adiabatic approximation. The calculation is carried out by using the fractional parentage expansion technique, which greatly simplify the calculation of the matrix elements of Hamiltonian. The results show that the ground state of the pentaquark has negative parity rather than positive parity, which was proposed by daffe-Wilczek. However the mass obtained is about 1651 MeV which is still higher than the observed mass 1540 MeV.     

Possible Instability of the Ground State of Two-Flavour Colour Superconductor Induced by Colour Neutrality

The diquark condensate susceptibility in neutral colour superconductor at moderate baryon density is calculated in the frame of the two-flavour Nambu-Jona-Lasinio model with the mean field approximation. When colour chemical potential is introduced to keep charge neutrality, the dlquark condensate susceptibility ＆ negative in the directions without diquark condensate in colour space, which may be regarded as a signal of the instability of the conventional ground state with only diquark condensate in the colour-3 direction.     

A new algorithm of background equalization in digtal sonar

1IntroductionBackgroundequalizationisnecessaryinpostprocessinginsomesignalprocessingapplica-tion.Theillterestingareaincludesfrequencyspectrumanalysisofsignal,weaksignaldetectioninnoise,spatialfilteringofdirectionaldataetc.Theearlierworkofbackgroundequalizationfocusedonfrequencydomainanalysisl1':].Thebackgroundequallzationcanimprovetheimagequalityoftime/frequencydisplay,suchasLOFAR,DEMoNimage,soitcanenhancethedetec-tionabilityorAnprovetheresolotionperformance.Thetargettracesinfrequencybins…     

Massive Quark Propagator in the Colour—Superconducting Phase

A more general expression for the quark propagator including both chiral and diquark condensates has been derived by using energy projectors.This makes it possible to study the phase transition from the hadron phase to the colour-superconductivity phase in the moderate baryon density region by using the Feynman diagrammatic method or the Green function method.     

Formation Region and Amplitude of Colour Superconductivity in an Instanton—Induced Model

Colour superconductivity is investigated in the frame of a two flavour instanton-induced model.The ratio of diquark to quark-antiquark coupling constants is restricted to be c/(Nc-1) with 1≤c≤2.87 and controls the formation region and amplitude of colour superconductivity.While the finite current quark mass changer the chiral transition significantly,it does not considerably change the colour superconductivity.     

A Novel Magnetic Linear Encoder Designed by Using the Slant Multi-Phase Filtering Model

A novel design model based on the slant multi-phase filtering model is presented. A magnetic linear encoder with sinusoidal output voltage waveform has been investigated, and the improved sinusoidal output waveform can be reasily acquired. A minimum 6% of distortion factor, when the difference of slant phase is 2π/3, is observed. It is found that the Wheatstone bridge type sensor, made of NiFe(450A)/NiO(300A) bilayers deposited on Si (001) substrate, can enhance both output signal and thermal stability, and then can be widely used in the field of magneto-resistive sensor.     

Three—Colour SIngle—Mode Electroluminescence from Alq3 Tuned by microcavities

Organic metal microcavities were fabricated by using full-reflectivity aluminium film and semi-transparent silver film as cavity mirrors.Unlike conventional organic microcavities,such as the typical structure of glass/DBR/ITO/-organic layers /metal mirror,a microcavity with a shorter cavity length was obtained by using two metal mirrors,where DBR is the distributed Bragg reflector consisting of alternate quarter-wave layers of high and low refractive index materials.It is realized that red,green and blue single-mode electroluminescence(EL) from the microcavities with the structure,glass/Ag/TPD/Alq3/Al,are electrically-driven when the thickness of the Alq3 layer changes,Compared to a non-cavity reference sample whose EL spectrum peak is located at 520nm with a full width at half maximum(FWHM)of 93nm,the microcavity devices show apparent cavity effects.The EL spectra of red,green and bule microcavities are peaked at 604nm,540nm and 491nm,with FWHM of 43nm,38nm and 47nm respectively.     

Control of the collapse of a Bose Condensate by Optical Dipole Force

We propose an experimental scheme of using the far-off resonance optical dipole force to control tunable collapse of Bose-Einstein condensation with attractive interactions. This scheme can conveniently alter collapse phenomena while keeping interatomic processes unchanged. Effects on the critical interaction strength and time delay are studied with numerical simulation. We show that for the blue-detuning case those two quantities are increased while for the red-detuning case they are decreased.     

A measurement of the forward-backward asymmetry of e+e?→bb by applying a jet charge algorithm to lifetime tagged events

The forward-backward asymmetry of has been measured using approximately 2.15 million hadronicZ ⁰ decays collected at the LEP e⁺e^– collider with the OPAL detector. A lifetime tag technique was used to select an enriched event sample. The measurement of the asymmetry was then performed using a jet charge algorithm to determine the direction of the primary quark. Values of:

Electroweak symmetry breaking and beyond the Standard Model physics — A review

In this talk, I shall first discuss the Standard Model Higgs mechanism and then highlight some of its deficiencies making a case for the need to go beyond the Standard Model (BSM). The BSM tour will be guided by symmetry arguments. I shall pick up four specific BSM scenarios, namely, supersymmetry, little Higgs, gauge-Higgs unification, and the Higgsless approach. The discussion will be confined mainly on their electroweak symmetry breaking aspects.      

A Lower Bound on the Entanglement in the Jaynes-Cummings Model

The entanglement between an atom and field is investigated by using the 3aynes-Cummings model. The initial atomic state is supposed in a mixed state and the field is in a squeezed state. The lower bound on the entanglement quantified by concurrence is calculated. It is found that the entanglement with the atom being initially in a mixed state can be larger than that with the atom being initially in a pure state. The entanglement is not a monotone function of the squeezing parameter r of the field and it achieves the maximum for certain r and then decreases with further increase of r.     

Multiple covariant differentiation—A new method

We present a new method for performing multiple covariant differentiation of relative tensors in an ordinary affine manifold. The method is more straightforward than the standard method as it possesses a strong resemblance to the multiple differentiation of ordinary functions. The unusual feature of the method is the need to form the covariant derivative of nontensorial objects.