查询词典 quantum physics

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。

Quantum Automata, a kind of mathematical model of quantum computation, has become an active research area gradually.

量子计算的一种数学模型——量子自动机的研究也成为一个日益活跃的研究领域。

In the system of two energy levels atom, based on the quantum theory and considering the effects of the outfield on the atom system, we can get the conclusion that the direction of external force is contrary to average acceleration, which conflicts with quantum Newton equation.

在二能级原子系统中，考虑外场对原子系统的影响，根据量子理论推导，容易得到外力与外力贡献的平均加速度方向相反的结论，这与量子牛顿方程相抵触，称之为佯谬。

The theory of quantum logic, which has developed during the course of the mathematical axiomatization of the quantum theory, is copious, with a history of 80 years.

量子逻辑是伴随着量子理论的数学公理化而发展起来的一种理论，有着80年的历史和丰富的内容。

The theory of quantum logic, which has developed during the course of themathematical axiomatization of the quantum theory, is copious, with a historyof 80 years.

伴随着量子理论的数学公理化而发展起来的量子逻辑理论，已有八十年历史和丰富内容。

We first review the basics of silicon-based donor spin quantum computer proposed by Kane, and how to control the system and construct the quantum gates, including Hadamard gate, CNOT gate and so on, in canonical gate decomposition ways.

首先，我们回顾肯恩的矽基底施子自旋量电脑系统，如何控制及构成量子逻辑闸，包括：阿达马逻辑闸、受控制否逻辑闸等等。

the establishment of glass resistive and capacitive coupling quantum dots model of the foundation, through analysis of the quantum dots electrostatic and chemical potential.

在建立玻璃中阻容耦合双量子点模型得基础，通过分析双量子点得静电能和化学势，讨论了化学势随外加偏压得变化和共振隧穿现。

The quantum cryptography communication is the combination of classical cryptography theory and quantum mechanics.

量子密码通信是经典密码学与量子力学相结合的新兴交叉学科。

The combination of quantum mechanics and classical information theory yields thenew subject of quantum information theory.

量子信息科学是物理科学与信息科学交叉融合产生的新兴学科领域。

The degeneration conditions for quantum gas system were analyzed based on statistical mechanics method. We point out the coincidence among these methods and the dependent properties of quantum gas system to its degeneration by comparing and analyzing these methods.

基于统计力学方法，从几种不同角度讨论了量子气体系统的简并条件，并通过分析和对比，指出它们本质上的一致性以及量子气体的性质对于其简并度的依赖关系。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"