查询词典 quantum state

And the coherent interaction of light and atoms has provided the effective way for quantum information transmission exactly from the quantum state of light field to the quantum state of particles.

在量子信息的存储和传输过程中，光场的量子噪声将会对信息提取的信噪比产生一定的影响。

The quantum amplitude amplification is the generalization of quantum Grover search algorithm. In this strategy, the Grover iteration has been replaced by two different quantum amplitude amplification operations. This makes it possible to collapse the system with probability 1, in other words, with certainty. The measurement operation in this scheme is only used to cancel the phase factor. Finally, one can use the admissible control to drive the system from the eigenstate to the target state and the control task is accomplished.

量子幅值放大是Grover迭代思想的一般化，该控制方案中采用两种不同的量子幅值放大操作替换了Grover迭代，使得期望本征态的概率幅的模在经过一定次数的迭代之后精确的等于1，然后借助于测量来消除相位因子，使系统的波函数确定性的塌缩到期望的本征态，最后再借助幺正演化，将系统从本征态控制到目标态，实现期望的控制任务。

The inner quantum orbital momentum of electron and the relative quantum distance between atomic nucleus and electron all relate to the quantum state of the atomic system.

证明氢原子系统的量子能量、系统内部电子的量子轨道动量及原子核和电子的量子相对距离均与原子系统所处的量子状态有关。

The polynomial representation of a quantum state is defined. Based on the CSS-type construction of quantum codes, a new method for encoding and decoding of CSS-type quantum convolutional codes is presented and corresponding networks are described.

定义了量子态的多项式表示形式，根据CSS型量子码的构造方法，给出了CSS型量子卷积码的一种新的编译码方法，描述了编译码网络。

The polynomial representation of a quantum state is defined. Based on the Calderbank-Shor-Steane- type construction of quantum codes, a new method for encoding and decoding of CSS-type quantum convolution codes is presented. Its corresponding networks are also described.

定义了量子态的多项式表示形式，根据Calderbank-Shor-Steane型量子码的构造方法，给出了CSS型量子卷积码的一种新的编译码方法，描述了编译码网络。

Quantum communication is a fashionable field of physics and informatics at present.Starting with the theoretical basis of quautum communication,the author investigats the method of dealing with information and the process of carrying information for both sides of communication.The variety of quantum state of transfers particle and unitary transformation matrix of acceptant are calculated in theory by four Bell radix.The circuitry of quantum communication is provided,and the author obtains Bell radix and qu...

量子通信是目前物理学和信息学科研究的热门领域，文章从量子通信的物理基础出发，研究了通信双方对信息的处理方法和信息的传输过程，从理论上分别计算了在4个Bell基下传输实体的量子态的变化和接收者的幺正变换矩阵；给出了实现通信的量子线路，并以该线路为基础计算了Bell基及对应的幺正变换矩阵和量子门。

This new phase applies to both linear quantum systems and nonlinear quantum systems,and should be particularly useful for the latter for which the adiabatic evolution of a general quantum state cannot be described in terms of a superposition of eigenstates.

这个新的几何相位同时适用于线性量子系统和非线性量子系统。它对于后者尤其重要因为非线性量子系统的绝热演化不能通过本征态的线性叠加来描述。

However , on the other hand, quantum information processing and quantum computing need stable coherent superposed state, then decoherence is a difficulty of realizing them, it is, therefore, an important issue to find methods for slowing down decoherence in order to stabilize the coherent superpositions in the field of quantum study.

然而，另一方面，量子信息与量子计算需要稳定的相干叠加态，而退相干是实现它们的障碍，因此，为了获得稳定的相干叠加态，寻找减小退相干的方法成为量子研究领域的重要议题。

It is confirmed that under the illumination of light the dark-adaptedBR is quickly turned into the light-adapted, and undergoes a photo-chemical cycle then through a sequence of intermediates of J, K, L,comes into a more stable intermediate-M state. M state relaxes to B state in about one hour. B state converts completely into D state after 24 hours. B state initiates the photochemical cycle under illumination, while it can transform into D state in the dark. So B state is a key intermediate in the BR photochemical cycle.

实验证实，样品受光照激发后很快从暗适应型经过光适应型进入光循环，经过一系列的光化学中间体到达较稳定的M态。M态经过约1小时热驰豫完全回到光适应型B态，B态再经过24小时缓慢热驰豫完全回到暗适应型D态。B态受光则进入光循环，不受光则转化为D态，从而认为B态是菌紫质光循环路径中一个重要的分支节点。

In this scheme, the description of unitary evolution and quantum measurement is unified and the quantum control operation is represented by probability state transition. The algorithm works as follows. At first a measurement is applied on the system. If the state after collapse is not the desired eigenstate, then system evolution will go on. After a period of time, the system is measured again. The process will go on like this until we get the desired eigenstate by measurement. Finally the system is driven to the target state with admissible control as before.

4把本征态能控性概念进一步向前发展，提出了概率能控性的概念，将幺正演化和量子测量这两种量子控制手段统一的用概率状态转移来描述，并针对一类特殊的本征态能控的系统，提出了幺正演化和测量交替进行的量子反馈控制策略：如果单步测量所得到的本征态不是期望的本征态，则让系统以这一本征态作为新的初态进行下一步的幺正演化，然后在适当的时候再次测量，让系统塌缩到某一本征态，如此重复进行，直到达到期望的目标态为止。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。