For the needs of spin machine, a lot of foreign varieties were introduced, and promoted a great leap of variety evolution.
为适应新的机械纺织的需要，国外优良品种被大量引入，促进了品种进化的一次飞跃。
A method used for describing the evolution behavior of AX spin system under multipulse sequence is introduced.
本文提出了一种用于描述多脉冲作用下ax自旋系统演化行为的相干图方法。
In particular, with time evolution, distribution and swing of the mean spin direction is closely related to the structure of the space where the initial coherent state centred in.
特别是随着时间的演化，系统的平均自旋方向的分布和摆动也与初态所处的空间结构有着密切的联系。
We study the dynamics evolution of a two-qubit Heisenberg XXX spin chain under a time-dependent rotating magnetic field.
我们研究了含时旋转磁场中海森堡XXX模型下的双量子比特的动力学演化情况。
A new model such as the causal evolution model of spin networks is needed to describe a dynamics process of loop quantum gravity.
还将这种方法与缠结理论做了比较；要描述圈量子引力的动力学过程，需要新的模型，自旋接网圈的因果演化模型就是其中的一种。
We have investigated theoretically the density distributions and evolution of the spin-dependent atomic wave packets in a harmonic potential.
研究了磁阱中自旋相关的原子波包的密度分布及其动力学演化。
We have investigated theoretically the density distributions and evolution of the spin-dependent atomic wave packets in a harmonic potential.
研究了磁阱中自旋相关的原子波包的密度分布及其动力学演化。
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