排序方式: 共有37条查询结果,搜索用时 31 毫秒
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研究了两个存在偶极相互作用的原子系统中的偶极平方压缩效应,讨论了原子偶极相互作用以及相位信息对压缩效应的影响,并进而探讨了原子偶极平方压缩与光场振幅平方压缩之间的关联. 相似文献
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詹佑邦 《新疆大学学报(理工版)》1994,11(3):56-59
本文利用微扰技术研究了与Dicke模型中N个两能级原子系统通过多光子过程相互作用的相干态场的时间演化.研究表明,若多光子Dicke模型中的N个两能级原子初始时皆处于去激发状态,则在短时近似下光场可存在二阶压缩效应. 相似文献
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Reduced quantum fluctuation in mesoscopic Josephson junction with nonclassical radiation field at finite temperature 下载免费PDF全文
We have investigated the reduced fluctuation properties in a mesoscopic Josephson junction with the squeezed state at a finite temperature. It is shown that the fluctuations increase with increasing temperature and the mesoscopic Josephson junction subsystem can exhibit squeezing behaviour at an appropriately low temperature. 相似文献
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A scheme for teleporting an unknown N-particle entangled W state is proposed via entanglement swapping. In this scheme, N maximally entangled particle pairs are used as quantum channel. As a special case, the teleportation of an unknown four-particle entangled W state is studied. 相似文献
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曲线坐标下的动量算符和动能算符 总被引:2,自引:2,他引:0
本文从量子力学算符必须满足厄密性这一基本原理出发,导出了曲线坐标下的动量算符的普适形式 ,得到了球坐标及柱坐标等曲线坐标中的动量算符的正确形式,又根据量子力学中的动能算符应是微分算符这一特点,导出了曲线坐标下动能算符的普适形式. 相似文献
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<正> 日本Anritsu 公司研制出一种KL506A 扫描激光束直径测量系统,该系统能测量各类圆形产品,如光导纤维的外径。将一束激光对准一面镜子照射,镜子固定在一个谐振叉形转向器的顶端,并将激光束反射。当激光束 相似文献
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Schemes for Teleportation of an Unknown Single-Qubit Quantum State by Using an Arbitrary High-Dimensional Entangled State 下载免费PDF全文
We propose a scheme to teleport an unknown single-qubit state by using a high-dimensional entangled state as the quantum channel. As a special case, a scheme for teleportation of an unknown single-qubit state via three-dimensional entangled state is investigated in detail. Also, this scheme can be directly generalized to an unknown f-dimensional state by using a d-dimensional entangled state (d〉f) as the quantum channel. 相似文献
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We propose some schemes for remote preparation of arbitrary high-dimensional equatorial entangled state via a single bipartite high-dimensional entangled state as quantum channel. We firstly present the remote preparation of bipartite three- and d-dimensional equatorial entangled state by using a single entangled qutrit and qudit pair, respectively, and then directly generalize the schemes to multipartite case. The cases of the quantum channel being non-maximally two-qutrit and two-qudit entangled state are also considered, respectively. In these schemes the required resources are single-particle projective measurement dimensional C-NOT operation. It is shown that the greatly reduced in our schemes. appropriate local unitary operation, auxiliary particle, and highentanglement resource and classical communication cost are both 相似文献
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<正> 英国的BT&D技术有限公司开发了一种可用于多种引线和连接器的小型可调衰减器。这种型号为MVA1000和MVA1100的装置可在一个很宽的动态范围内工作,它们的金属化滤光片装置可连续调节至30dB。用于多模光导纤维的MVA1000装置是一 相似文献