Journals >Chinese Journal of Quantum Electronics
Contents
2001
Volume: 18 Issue 3
22 Article(s)
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Research Article
Realization of the Quantum Teleportation in Quantum Computing Network
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
A scheme of teleporting three quantum state simultaneously via quantum computing network is proposed. Comparing with the previous schemes, this scheme not only is more efficient, and more in agreement with the origin definition of quantum teleportation, but also can be readily extended to teleporting simultaneously manA scheme of teleporting three quantum state simultaneously via quantum computing network is proposed. Comparing with the previous schemes, this scheme not only is more efficient, and more in agreement with the origin definition of quantum teleportation, but also can be readily extended to teleporting simultaneously many unknown quantum state and the teleportation of many-particle maximally entangled state..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 193 (2001)
The Quantum Theory of the Double-slit Interference of Electrons
[in Chinese]
The double-slit interference of electrons is analyzed by using the Feynman functional integration (path integrals),and the conclusion is in keeping with light's. Finally,on the basis of harmonizing the Vierbein representation of the local Lorentz group gravitational gauge theory and the special theory of relativityThe double-slit interference of electrons is analyzed by using the Feynman functional integration (path integrals),and the conclusion is in keeping with light's. Finally,on the basis of harmonizing the Vierbein representation of the local Lorentz group gravitational gauge theory and the special theory of relativity (SR) with the quantum theory as a unified logical system,the interpretations of many different opinions discussing tile double-slit interference of electrons are also clarified in this paper..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 198 (2001)
Infrared Stretching Spectra of OH- Radicals in Undoped and Doped Sapphire Crystals
[in Chinese], [in Chinese], and [in Chinese]
By comparing the infrared stretching bands of OH - bonds in Ti-doped sapphire samples with the infrared bands of OH - bonds in undoped sapphire samples,it is demonstrated definitely that in Ti-doped sapphire only a band 3309 cm-1 is close relationship with Ti ions,the other bands such as 3232 cm-1,3183 cm-1 have no relBy comparing the infrared stretching bands of OH - bonds in Ti-doped sapphire samples with the infrared bands of OH - bonds in undoped sapphire samples,it is demonstrated definitely that in Ti-doped sapphire only a band 3309 cm-1 is close relationship with Ti ions,the other bands such as 3232 cm-1,3183 cm-1 have no relation with Ti ions. The OH-bonds which cause the band 3309 cm-1 must have adjacent Ti4+ ions. In undoped sapphire and ruby,the OH - bonds which cause the band 3278 cm-1 must have adjacent chromium ions. We suggest that the band is due to a stretching absorption of a interstitial OH - ion adjacent to a Cr2+-Cr4+ pair.
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 202 (2001)
Study of Glass Microsphere Spectra Modified by Cavity QED Effect
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
In this paper,we discuss the fluorescence of cavity quantum electro-dynamoic(QED) effect on the fluorescence spectra of glass microsphere. The fluorescence spectrum of the glass microsphere (13.220 μm in diameter) is analyzed. The cavity QED enhancement of spontaneous emission rate is estimated to reach 676 times.In this paper,we discuss the fluorescence of cavity quantum electro-dynamoic(QED) effect on the fluorescence spectra of glass microsphere. The fluorescence spectrum of the glass microsphere (13.220 μm in diameter) is analyzed. The cavity QED enhancement of spontaneous emission rate is estimated to reach 676 times..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 207 (2001)
Optical Polarized Absorption Characteristic of Co:MgF2 Crystal
[in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Measuring data of transmission and absorption coefficient for the Co:MgF2,crystal were obtained by using 1320 nm wavelength YAG laser. Higher absorption exists in π-polarization plane and optical axis direction,absorption coefficients were 1.35 cm-1 and l.20 cm-1,respectively.Measuring data of transmission and absorption coefficient for the Co:MgF2,crystal were obtained by using 1320 nm wavelength YAG laser. Higher absorption exists in π-polarization plane and optical axis direction,absorption coefficients were 1.35 cm-1 and l.20 cm-1,respectively..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 210 (2001)
Measurement of Four Cavity Mirrors Reflectivity and Absorptionof the Cavity with Cavity Ringdown Spectroscopy
[in Chinese], [in Chinese], and [in Chinese]
The reflectivity of mirrors in variant circumstances is different. Using the cavity ringdown method and Changing the used mirrors,we measured the reflectivity of four mirrors under the ordinary condition and obtained the absorption of the cavity.The reflectivity of mirrors in variant circumstances is different. Using the cavity ringdown method and Changing the used mirrors,we measured the reflectivity of four mirrors under the ordinary condition and obtained the absorption of the cavity..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 213 (2001)
The Theory of Cavity Ring-down Spectroscopyon the Abnormal Condition
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
In this paper,we got the regularity of cavity ring-down spectroscopy when the line width of laser pulse is far larger than the absorption line width of measured substance. the measure sensitivity on this condition is also presented.In this paper,we got the regularity of cavity ring-down spectroscopy when the line width of laser pulse is far larger than the absorption line width of measured substance. the measure sensitivity on this condition is also presented..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 217 (2001)
Self-collimation Method for Measuring the GeometricParameters of Solid Immersion Lens
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
In the present paper we introduce the self-collimation method to measure the geometric parameters of solid immersion lens (SIL). A laser beam collimated by an objective is impinging upon the SIL. The reflection beams from the spherical surface and bottom plane can be Changed into self-collimation beams after passing thIn the present paper we introduce the self-collimation method to measure the geometric parameters of solid immersion lens (SIL). A laser beam collimated by an objective is impinging upon the SIL. The reflection beams from the spherical surface and bottom plane can be Changed into self-collimation beams after passing through the objective when the SIL is put at three parti cular axial positions. The spherical radius,index and other parameters of the SIL can be obtained from these positions. The expression of self-collimation positions and experimental results of two SIL are given..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 221 (2001)
Fizeau Wavemeter for Laser Wavelength Measurement
[in Chinese], and [in Chinese]
It usually need to measure the wavelength of laser by an accurate and fast means,we have developed an instrument to measure laser wavelength. The optical design is based on a Fizeau wedge interferometer,which together with spatial filtering and collimating optics is used to produce a pattern of parallel fringes which iIt usually need to measure the wavelength of laser by an accurate and fast means,we have developed an instrument to measure laser wavelength. The optical design is based on a Fizeau wedge interferometer,which together with spatial filtering and collimating optics is used to produce a pattern of parallel fringes which is imaged on a linear photodiode array and analyzed by computer.
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 224 (2001)
Calculation and Measurement of the Stretching Factor inChirped-pulse Amplification Laser Syste
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
In this paper,the stretching factor in chirped-pulse amplification laser system was estimated by a simple method. The influence factors were analyzed and the result was compared with two kinds of measurement results,which shows that the calculation result is quite accurate. the calculation can offer the effective meansIn this paper,the stretching factor in chirped-pulse amplification laser system was estimated by a simple method. The influence factors were analyzed and the result was compared with two kinds of measurement results,which shows that the calculation result is quite accurate. the calculation can offer the effective means in analyzing ultra-short pulses stretched by stretcher in CPA..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 228 (2001)
Theoretical Analysis for Optical Limiting Effectin ldeal Focusing System
[in Chinese], [in Chinese], and [in Chinese]
The article takes optimum analysis for optical limiting effect caused by nonlinear media in the focusing optical system using Gauss analytical method. Optical limiting effect and its sensitivity are discussed firstly under geometric distribution of far field and near field (focal plane),and we also consider the dependeThe article takes optimum analysis for optical limiting effect caused by nonlinear media in the focusing optical system using Gauss analytical method. Optical limiting effect and its sensitivity are discussed firstly under geometric distribution of far field and near field (focal plane),and we also consider the dependency of optical limiting effect on the distance between sample and pinhole in detail firstly..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 232 (2001)
Threshold Effect of Stimulated Briliouin Scattering
[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], and [in Chinese]
We discussed the influence of the threshold effect of stimulated Brillouin-scattering on the divergence and line-width of stimulated scattering light,and the light power density of a certain region of target. A point beacon light on a target of far field can be obtained by the means of the threshold effect of stimulateWe discussed the influence of the threshold effect of stimulated Brillouin-scattering on the divergence and line-width of stimulated scattering light,and the light power density of a certain region of target. A point beacon light on a target of far field can be obtained by the means of the threshold effect of stimulated Brilouin-scattering..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 236 (2001)
Squeezing Effect of a Moving Atom Interacting with a. Model Field
[in Chinese], and [in Chinese]
In this paper,the squeezing effect of a moving atom interacting with a model field is investigated. It is shown that the moving atom may exhibit long time squeezing effect for some choiced system parameters.In this paper,the squeezing effect of a moving atom interacting with a model field is investigated. It is shown that the moving atom may exhibit long time squeezing effect for some choiced system parameters..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 240 (2001)
Jaynes-Cummings Model for Inverse Operators via SupersymmetricUnitary Transformation
[in Chinese], [in Chinese], and [in Chinese]
For Jaynes-Cummings model which contains the inverse operators,we find its supersymmetric structure and diagonalize the Hamiltonian via the method of supersymmetric unitary transformation. Therefore,its eigenvalues of the states and transition probabilities are also calculated.For Jaynes-Cummings model which contains the inverse operators,we find its supersymmetric structure and diagonalize the Hamiltonian via the method of supersymmetric unitary transformation. Therefore,its eigenvalues of the states and transition probabilities are also calculated..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 244 (2001)
The Quantum Channel and Quantum Mutual Entropy for Correlated Two Mode SU(1,1) Coherent States in J-C Model
[in Chinese], and [in Chinese]
We use the information entropy theory to study the dynamical properties for correlated two mode SU(l,1) coherent states in J-C model. We concretely give the quantum mechanical channel representing the state change of atom in the model,derive a general expression of the quantum entropy representing the capability of theWe use the information entropy theory to study the dynamical properties for correlated two mode SU(l,1) coherent states in J-C model. We concretely give the quantum mechanical channel representing the state change of atom in the model,derive a general expression of the quantum entropy representing the capability of the channel transmitting atomic initial information,and examine the effects of the phase coherence and the state parameters of initial cavity field on the quantum channel and mutual entropy..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 249 (2001)
Phase Properties of the Field and Atomic Coherent Trapping in a System of A-type Three-level Atom Interacting with Two-mode SU(2) Coherent Field
[in Chinese], and [in Chinese]
In this paper,the phase properties of two-mode SU(2) coherent field interacting with A-type three-level atom are investigated. We find that single-mode phase and the sum of the two-mode phase are all randomly distributed. The expressions of average value and variance of the phase difference are presented. The effects oIn this paper,the phase properties of two-mode SU(2) coherent field interacting with A-type three-level atom are investigated. We find that single-mode phase and the sum of the two-mode phase are all randomly distributed. The expressions of average value and variance of the phase difference are presented. The effects of atomic initial state and the atom-field coupling strengths on the variance of the phase difference are examined. That the atomic coherent trapping will be taken place under an appropriate condition is verified..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 255 (2001)
Influence of Generalized Kerr-medium on the Quantum Properties ofthe Atom Interacting with Two-mode Squeezed Vacuum Field
[in Chinese], and [in Chinese]
The time evolution of population number and dipole squeezing of the atom in the system of two-mode squeezed vacuum field interacting with a two-level atom in generalized Kerr-medium are studied by means of quantum theory. The influences of coupling constant and detuning on the atomic system action are discussed emphatiThe time evolution of population number and dipole squeezing of the atom in the system of two-mode squeezed vacuum field interacting with a two-level atom in generalized Kerr-medium are studied by means of quantum theory. The influences of coupling constant and detuning on the atomic system action are discussed emphatically..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 261 (2001)
Effects of Kerr-like Medium on the Cavity Field Spectra ofthe Nondegenerate Two-photon Jaynes-Cummings Model
[in Chinese], [in Chinese], and [in Chinese]
The cavity field spectra for the nondegenerate two-photon Jayners-Cummings model with an additional Kerr-like medium are investigated. The results for the initial fields in pure number states,coherent states or thermal states are presented. The effects of Kerr-like medium on the cavity field spectra are analyzed. It isThe cavity field spectra for the nondegenerate two-photon Jayners-Cummings model with an additional Kerr-like medium are investigated. The results for the initial fields in pure number states,coherent states or thermal states are presented. The effects of Kerr-like medium on the cavity field spectra are analyzed. It is found that the frequency of one mode can be Changed easily by changing the intensity of the other mode..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 269 (2001)
The Dependence of the Quantum Fluctuation of a Mesoscopic Coupled Circuit on Temperature
[in Chinese], and [in Chinese]
It is pointed out the fact that electric currents in the circuits naturally produce Joule heat,it is inevitable that the practical electric circuits are working at a finite temperature. So we discuss the quantum effects of non-dissipative mesoscopic coupled circuit at a finite temperature in this paper,the result showsIt is pointed out the fact that electric currents in the circuits naturally produce Joule heat,it is inevitable that the practical electric circuits are working at a finite temperature. So we discuss the quantum effects of non-dissipative mesoscopic coupled circuit at a finite temperature in this paper,the result shows that quantum fluctuations of both charge and current depends on the temperature..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 274 (2001)
Effect of the Modulated Doping on the Work Voltage of HB-LED
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
Based on the results of AlGaInP LED samples measured by electro-chemical C-V profiler and their work voltages,we analyzed the contact-voltage difference from the homo-junctions,such as N+-N and P+-P junction,pointed out that the carrier density distribution of the modulated doping have a distinctive effect on the work Based on the results of AlGaInP LED samples measured by electro-chemical C-V profiler and their work voltages,we analyzed the contact-voltage difference from the homo-junctions,such as N+-N and P+-P junction,pointed out that the carrier density distribution of the modulated doping have a distinctive effect on the work voltage of HB-LED,and presented the method decreasing further HB-LED's work voltage..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 278 (2001)
Measurement of the Flow Field of the Water Mist by 3D LDV
[in Chinese], [in Chinese], [in Chinese], and [in Chinese]
The LDV (Laser Doppler Velocimetry) system can be used to measure the flow field velocity according to the Doppler frequency shift and the Doppler phase shift theory. The measuring technology of the flow field by the LDV was explained. The 3D flow field velocity of the water mist was studied and the reasonable results The LDV (Laser Doppler Velocimetry) system can be used to measure the flow field velocity according to the Doppler frequency shift and the Doppler phase shift theory. The measuring technology of the flow field by the LDV was explained. The 3D flow field velocity of the water mist was studied and the reasonable results was obtained from the simulated experiments..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 281 (2001)
Logarithmic Current-to-voltage Converter for Local Probe Microscopy
[in Chinese], and [in Chinese]
A quasilogarithmic current-voltage converter has been built which allows currents spanning an exceptionally broad range from 10 pA to 10 mA with a bandwidth greater than 2 kHz. The converter is based on the virtual ground scheme employing semiconductor diodes as nonlinear elements in the feedback path. It can expand itA quasilogarithmic current-voltage converter has been built which allows currents spanning an exceptionally broad range from 10 pA to 10 mA with a bandwidth greater than 2 kHz. The converter is based on the virtual ground scheme employing semiconductor diodes as nonlinear elements in the feedback path. It can expand its band of frequence through additional circuits. Its dynamic range of input is broadened by using several pairs of diodes. It is ideally suited for studying local interactions in scanning tunneling microscopy..
Chinese Journal of Quantum Electronics
- Publication Date: Jun. 01, 2001
- Vol. 18, Issue 3, 285 (2001)
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