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Table of Content
20 July 2008 Volume 27 Issue 7
著者文摘
Proving the completeness of the displaced Fock states by IWOP technology
. 2008, 27(7): 1-1.
Abstract
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688
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(213KB) (
464
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The completeness of the coherent state is proved by using the technique of integration within the ordered product （IWOP） ,where the integral variables z and z^＊ have been preformed independent transformation. Both the completeness and the property of the coherent state of the displaced Fock state D（z） │n〉 are also proved by using the IWOP.
Solving EPR-type entangled states of continuous variable by virtue of normally ordered product method
. 2008, 27(7): 3-3.
Abstract
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665
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(215KB) (
520
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The method getting the specific form of EPR-type entangled state of continuous variable in Fock representation is proposed. The specific form of bipartite EPR entangled state in Fock representation is derived by using the properties of normally ordered product （NOP） and operating the function of boson operators in the form of NOP. Furthermore,the method is applied to getting the specific form of multi-partite EPR entangled state in Fock representation. So,it is a general method.
Scattering matrix method and numerical simulation for electronic quantum tunneling a double-barrier
. 2008, 27(7): 6-6.
Abstract
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911
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(279KB) (
686
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Using the scattering matrix method, we study the characteristics of electronic tunneling a double square barrier. Taking into account the tunneling current with ballistic and diffusive components,we present the resuits of ballistic component for oscillation of the transmission coefficient,while the diffusive one leads to decay. It is shown that the overall transmission coefficient of the double-barrier potential is related to the height of potemtial barrier and the matching of incident wave and the out wave. The conclusions are confirmed by the numerical results.
Analysis of entanglement properties for electron-hole pair tunneling through a single square barrier
. 2008, 27(7): 9-9.
Abstract
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738
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(220KB) (
416
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The entanglement properties of electron-hole pair for an electron tunneling through a single square barrier are analyzed. The behavior of the concurrence with varying the barrier height, depending on the level configuration,is shown to be a law.
solution of equations of damped forced oscillation for A2B model
. 2008, 27(7): 12-12.
Abstract
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725
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(321KB) (
563
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The general solution of equations of damped forced oscillation for A： B model is solved and the vibration image is discussed.
Calculation and discussion of electrostatic field distribution of infinite long dielectric column shell in an external uniform electric field
. 2008, 27(7): 17-17.
Abstract
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1163
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(208KB) (
893
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The electric potential and electric field in every area of an infinite long electric dielectric column shell which located in an external uniform electric field are calculated by using the separation variable method in the cylindrical coordinate, and the effect of electric shield of the column shell is analyzed. Also, the electric potentials and electric fields for the infinite long conductor column shell, the infinite long electric dielectric column, the infinite long conductor column in a homogeneous electric field, and the infinite long cylinder cavity in an infinite electric dielectric can be obtained from our method.
Algebra equation for light refraction in general optical curved faces with mutation refractivity in two sides
. 2008, 27(7): 20-20.
Abstract
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649
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(210KB) (
307
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The algebra equations for light refraction in general curved faces with mutation refractivity in two sides are given based on the light-ray equation of geometrical optics. The problems about focus and focal length of spheric faces are discussed and simulated with computer. This method is helpful for teaching and comprehending the light behavior in geometrical optics.
A few processing methods and their comparison for atom structure
. 2008, 27(7): 23-23.
Abstract
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502
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(418KB) (
391
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A few kinds of familiar processing methods in the problem of atom structure, emphasizing the full core plus correlation （FCPC） method, are discussed. Their respective predominance and defect are summarized by comparing these methods.
Assisting experiment teaching of Michelson using ZEMAX software
. 2008, 27(7): 28-28.
Abstract
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1373
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(502KB) (
1393
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The Michelson interferometer configuration in the optical experiment is modeled using the ZEMAX software. The multiform layouts of the configuration lead students to make up a clear image of ray path. Time-dependent simulation of phenomena in the experiment is realized by using the ZPL program, which makes students hold exactly phenomena in the ideal condition. The influence of error from different aspects and different magnitudes on the interference pattern is analyzed by altering primary parameters in the configuration. The conclusions should be instructive for students to adjust optical instruments effectively and correctly.
Discussion of linking between basal experimen and design experiments
. 2008, 27(7): 34-34.
Abstract
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511
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(254KB) (
470
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Designing experiment is very important for cultivating students＇ innovation capability, however it brings more contradictions in the process of actualizing, which decreases the function of designing experiments. In order to solve these contradictions, we try to explore the linking between basal experiments and design experiments.
The road to be, scientists： from PhD candidates to Noble prize winners
. 2008, 27(7): 37-37.
Abstract
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570
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(332KB) (
466
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The relation between the doctoral dissertation and the prized works for Noble physical prize winners is discussed. The role of teachers for the prize winners in the period of getting the PhD degree is also analyzed. The period of PhD candidate is very important for a person to be a first-class scientist.
Detecting technology of laser surpasses sound without mean and its application in nature testing of rock mass
. 2008, 27(7): 41-41.
Abstract
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670
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PDF
(324KB) (
591
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The detecting technology of laser surpasses sound without mean is an important approach. The principle of laser surpasses sound and the signal detecting method are introduced. The application to testing the rock mass thing nature is analyzed in detail, and the direction specifically for some technology difficult problems of existence at present is proposed.
Applications of physical agricultural techniques in fundamental agricultural science and engineering
. 2008, 27(7): 45-45.
Abstract
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639
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(429KB) (
615
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Based on the stress to the significance of physical agriculture to modern agriculture development, this paper reviews the applications and status in the physical agriculture techniques in fundamental agriculture from the improving effects of physical factor to crops＇ culture and growth and collecting function of physical techniques onto agro-environmental information. Then, we come to develop the modern agriculture model with improving the physical agriculture combining with excellent physical agriculture techniques under the synthetic consideration to the agro-environments in China.
Research and discussion for bilingual college physics in experimental class
. 2008, 27(7): 50-50.
Abstract
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565
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(331KB) (
604
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The method of bilingual college physics in the experimental class is introduced, some experiences in teaching process are concluded, as well as the feasibility of bilingual teaching in all non -physical specialties is also discussed.
Experimental instrument for Doppler effect based on multiplier
. 2008, 27(7): 53-53.
Abstract
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730
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(238KB) (
319
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A kind of experimental instrument for the Doppler effect based on a multiplier is introduced. The output signal of ultrasonic receiver is processed to keep the amplitude constant before connecting to the multiplier, and the inspiriting signal of the emitter is used as a conference signal of the multiplier. The output of the multiplier passed through a low-pass filter then the Doppler frequency shift can be obtained and the speed of the receiver is calculated. The structure of this instrument is simple and the physical phenomenon of Doppler effect is easy to be observed. So it is suitable to be used in the physical experiments.
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