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The generation of atomic entanglement is discussed in a system that atoms are trapped in separate cavities which are connected via optical fibres. Two distant atoms can be projected to Bell-state by synchronized turning off of the local laser fields and then performing a single quantum measurement by a distant controller. The distinct advantage of this scheme is that it works in a regime where Δ≈κ〉〉g, which makes the scheme insensitive to cavity strong leakage. Moreover, the fidelity is not affected by atomic spontaneous emission. 相似文献
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由于各个大中专院校的学制不一,对珠算课时的安排多少有别,除一般短期培训班全期安排课时特少外,其余多数中专及高级职业中学一、二年级四学期分别为“二、二、一、一”课时,(有的三年制学校三个年段都设珠算课;有的学校一年级每周安排四课时之多)。各位教师多是在一年段两个学期内教完最起码的一种加减、乘、除法,接着也做了一些巩固、提高、技术鉴定等工作。这阶段学生 相似文献
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Schiff碱型大环配体能与周期表中的大多数金属离子形成稳定的配合物,是配位化学的一个重要研究方向.对其多核配合物的研究,不仅有助于认识生物体中多金属中心配合物,还有助于对这类化合物的键合、多电子还原、磁交换性质等方面的研究.为此,我们合成了未见文献报道的Schiff碱型四呋喃[26]-N_4O_4大环配体(L)及其过渡金属(Cu(Ⅱ)、Co(Ⅱ)、Zn(Ⅱ)、Cd(Ⅱ))配合物(2MCl_2·L·2H_2O),并对它们的性质作了初步的研究. 相似文献
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In the past few years, attention has mainly been focused on the symmetric Brownian motor(BM) with Gaussian noises, whose current and energy conversion efficiency are very low. Here, we investigate the operating performance of the symmetric BM subjected to Lévy noise. Through numerical simulations, it is found that the operating performance of the motor can be greatly improved in asymmetric Lévy noise. Without any load, the Lévy noises with smaller stable indexes can let the motor give rise to a ... 相似文献
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一、选择题1.下列变化属于化学变化的是()A.冰融化成水B.工业上分离液态空气制氧气C.蓝色硫酸铜晶体受热变成白色粉末D.蜡烛熔化2.下列物质中属于纯净物的是()A.新鲜的空气B.碘酒C.水煤气D.熔融的硝酸钾 相似文献
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