quantum constant 中文意思是什麼
quantum constant
解釋
量子常數-
When the field is slowly - varying, the scalar field potential acts like a cosmological constant. in addition to the quintessence models, many other theories for dark energy have been proposed, including models based on super - symmetric gauge theories, super - gravity, small extra dimensions, large extra dimensions, quantum field theory effects in curved space - time. all these models are essentially based on the existence of a mass less scalar field acting at a cosmic scale
除了真空場模型外，科學家亦提出其他解釋黑暗能量的理論，這些模型建基於不同的物理理論或假設，例如超對稱規范理論超重力增加一些小或大的空間維數量子力學在彎曲時空的影響等等，這些理論模型，返本溯源，其實背後都假設存在著一個特性類似於宇宙常數的無質量純量場。 -
The amazing character of the quantum capacity of gaussian channel is that planck constant h takes over the place of input power restriction of classical capacity
高斯通道量子容量的迷人特徵是普朗克常數h取代了經典容量中輸入信號功率限制條件的位置。 -
String theory, which unites gravity with quantum mechanics, offered the hope of explaining the attenuated cosmological constant
統合重力及量子力學的弦論，似乎能為微小的宇宙常數提供一個合理解釋。 -
It is found that if the cavity dissipation is losses and the reservoir is in vacuum, the quantum nonlocality appears periodically. when the cavity dissipation and the average photon number of the reservoir are taken into account, the initial quantum nonlocality will be lost. the rapidity of the loss of the initial quantum nonlocality depends on the amplitude of the initial field, the average photon number n and the cavity damping constant k
結果表明，如果腔場無損耗且處于真空庫，則量子態周期性地顯現出一定的非局域性；如果考慮到腔場的損耗和熱庫的平均光子數，那麼，量子態將會喪失它初始的非局域性，初始量子非局域性喪失的速度與初始腔場的幅度、腔的衰減系數以及熱庫的平均光子數有關，場越強、平均光子數和衰減系數越大，量子非局域性喪失得就越快。 -
In the second part, we discuss the binding energy of the impurity in finite gaas / gai. xalxas quantum wire in the first place, in which the dismatch of effective mass and dielectric constant between the well and the barrier is taken into account
在第二部分，首先討論了有限深gaas ga _ （ 1 - x ） al _ xas量子阱線中雜質態的束縛能，其中考慮到了阱壘中電子有效質量及材料中介電常數的失配性。 -
We have investigated transport properties of electrons in magnetic quantum structures under an applied constant electric field. the transmission coefficient and current density have been calculated for electron tunneling through structures consisting of identical magnetic barriers and magnetic wells and structures consisting of unidentical magnetic barriers and magnetic wells. it is shown that the transmission coefficient of electrons in a wider nonresonance energy region is enhanced under an applied electric field. the resonance is suppressed for electron tunneling through double - barrier magnetic ( dbm ) structures arranged with identical magnetic barriers and magnetic wells. incomplete resonance at zero bias is changed to complete resonance at proper bias for electron tunneling through dbm structures arranged with different magnetic barriers and magnetic wells. the results also indicate that there exist negative conductivity and noticeable size effect in dbm structures
對磁量子結構中電子在外加恆定電場下的輸運性質進行了研究.分別計算了電子隧穿相同磁壘磁阱和不同磁壘磁阱構成的兩種磁量子結構的傳輸概率和電流密度.計算結果表明，在相當寬廣的非共振電子入射能區，外加電場下電子的傳輸概率比無電場時增加.對于電子隧穿相同磁壘磁阱構成的雙磁壘結構，共振減弱；對于電子隧穿不同磁壘磁阱構成的雙磁壘結構，無電場作用時的非完全共振在適當的偏置電壓下轉化為完全共振，這時的電子可實現理想的共振隧穿.研究同時表明，磁量子結構中存在著顯著的量子尺寸效應和負微分電導 -
In a quantum world, at the most fundamental level everything is in a state of constant flux, even “ empty ” space, which is in fact filled with virtual particles that perpetually pop in and out of existence
在量子世界中，所有的東西在最基本的層次上都會不停的變動，即使是在真空中，也有虛粒子不停地出現又消失。 -
The results indicate that for hydrogen atom the theoretical values of its energy, ground state energy and spectrum constant all relate to the quantum size of the electron and the nucleus of hydrogen atom
結果表明，氫原子的能量、氫原子的基態能量、氫原子的光譜常數均與氫原子中的原子核及電子的量子尺寸有關。 -
Abstract : ferroelectric based nanocomposites are a new class of mesoscale functional materials which have a high dielectric constant and high electric field. recent progress in this research area is reviewed briefly, and a novel ferroelectric composite with embedded semiconductor quantum dots, including its preparation and optical properties, is reported. this material has promising applications in new electroluminescent devices and quantum dot lasers
文摘:鐵電體基納米復合材料作為一類新型功能材料，提供了一系列「高介-高場」調制的介觀系統.文章介紹了這一領域的最新研究進展，並重點報道了一類新型鐵電體基納米復合材料鐵電體半導體量子點復合材料的制備與光學性質，該材料在新型電致發光元件及量子點激光器件中有著很好的應用前景 -
Firstly, we calculate variationally the binding energy and correlation energy of excitons in finite deep gaas - al0. 33ga0. 67as quantum wells. in the calculation, we consider the effect of effective mass and dielectric constant mismatch in the two materials. the results we obtained are basically conformed to the ones obtained from the previous theory and experiment
首先，我們計算了有限深gaas - al _ （ 0 . 33 ） ga _ （ 0 . 67 ） as量子阱中激子的束縛能，其中考慮到了阱和壘兩種材料中電子和空穴的有效質量以及介電常數的失配影響，我們計算得到的激子的束縛能及相關能與前人的理論結果和實驗結果基本上相符合。
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