首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   15篇
  完全免费   10篇
  物理学   25篇
  2017年   1篇
  2016年   1篇
  2014年   3篇
  2013年   2篇
  2012年   1篇
  2010年   2篇
  2009年   1篇
  2008年   1篇
  2007年   1篇
  2006年   2篇
  2004年   1篇
  2003年   3篇
  2002年   5篇
  2000年   1篇
排序方式: 共有25条查询结果,搜索用时 171 毫秒
1.
三粒子纠缠相干态的隐形传态   总被引:19,自引:9,他引:10       下载免费PDF全文
提出了一个利用一个两粒子最大纠缠相干态和一个三粒子纠缠相干态作为量子信道进行三粒子纠缠相干态隐形传态的方案.该方案只需线性光学操作和双模光子数测量.计算结果表明,应用本方案的设置,隐形传态成功的概率与所用的相干态的平均光子数有关,反映了纠缠相干态的非正交特性.  相似文献
2.
三粒子纠缠W态的隐形传态   总被引:17,自引:0,他引:17       下载免费PDF全文
郑亦庄  戴玲玉  郭光灿 《物理学报》2003,52(11):2678-2682
提出利用三个二粒子纠缠态作为量子信道,实现三粒子纠缠W态的隐形传态的方案.首先考察量子信道是最大纠缠态的情形,然后进一步考察量子信道是非最大纠缠态的情形.发现在量子信道为非最大纠缠态时,通过引进一个辅助粒子,并构造一个幺正变换矩阵,即可以一定的概率完成三粒子纠缠W态的隐形传态.  相似文献
3.
Teleportation of a three—particle entangled W state   总被引:7,自引:0,他引:7  
We have investigated the problem of teleporting a three-particle entangled W state and we propose a scheme based on entanglement spapping to complete the teleportation.We also put forward a scheme for the teleportation of a general W state by using nonmaximally entangled quantum channels.The probability of success of the latter scheme is obtained.  相似文献
4.
We propose a protocol for implementation of nonlocal CNOT operation using a partially entangled channel and show that when partially entangled pairs are taken as quantum channels, the nonlocal CNOT operation can be implemented probabilistically by introducing a collective unitary transformation. The required resources for implementation of the nonlocal CNOT operation in this case are discussed. We also point out that the nonlocal CNOT operation can be used as a puritlcation protocol to concentrate entanglement from an ensemble of partially entangled particles into a subensemble of maximally entanglement ones.  相似文献
5.
Remote State Preparation via a Non—Maximally Entangled Channel   总被引:3,自引:0,他引:3       下载免费PDF全文
We investigate remote state preparation (RSP) via a non-maximally entangled channel for three cases:a general qubit;a special ensemble of qubits (qubit states on the equator of the Bloch sphere);and an asymptotic limit of N copies of a general state.The results show that the classical communication cost of RSP for the two latter cases can be less than that of teleportation,but for the first case,in a restricted setting,the classical communication cost is equal to that of teleportation.Whether or not this is the case for a more general setting is still an open question.  相似文献
6.
Implementation of nonlocal quantum swap operation on two entangled pairs   总被引:2,自引:0,他引:2  
We propose a scheme for the implementation of nonlocal quantum swap operation on two spatially separated entangled pairs and we show that the operation can swap two qubits of these entangled pairs.We discuss the resources of the entangled qubits and classical communication bits required for the optimal implementation of the nonlocal quantum swap operation.We also put forward a scheme for probabilistic implementation of nonlocal swap operation via a nonmaximally entangled quantum channel.The probability of a successful nonlocal swap operation is obtained by introducing a collective unitary transformation.  相似文献
7.
Teleportation of M—Qubit Unitary Operations   总被引:1,自引:0,他引:1       下载免费PDF全文
We discuss teleportation of unitary operations on a two-qubit in detail,then generalize the bidirectional state teleportation scheme from one-qubit to M-qubit unitary operations.The resources required for the optimal implementation of teleportation of an M-qubit unitary operation using a bidirectional state teleportation scheme are given.  相似文献
8.
电磁场角动量守恒及其应用   总被引:1,自引:1,他引:0  
郑亦庄 《大学物理》2000,19(1):10-12,18
由带电体与电磁场相互作用时角动量守恒推导出电磁场角动量及角动量流的具体表达式,讨论了电磁角动量对于深入理解电磁场基本属性的作用以及它在微观物理学研究中的应用。  相似文献
9.
Teleportation of a multiqubit state by an entangled qudit channel   总被引:1,自引:0,他引:1  
郑亦庄  顾永建  吴桂初  郭光灿 《中国物理》2003,12(10):1070-1075
We investigate the problem of teleportation of an M-qubit state by using an entangled qudit pair as a quan-tum channel and show that the teleportation of a multiparticle state can correspond to the teleportation of a multi-dimensional state. We also introduce a quantum-state converter composed of beamsplitter arrays, on/off-detectors and cross-Kerr couplers and demonstrate that the state conversion from an M-qubit to an N-dimensional qudit and vice versa can be implemented with this converter, where N = 2^M. Based on this, an experimentally feasible scheme for the teleportation of an M-qubit via an entangled N-level qudit pair channel is proposed.  相似文献
10.
量子计算机能够解决经典计算机难以处理的问题,比如大数分解等。然而,在实际操作中,需要对足够多的量子位进行逻辑操作,而制备和操作大数量的量子位已经遇到了阻力;Grover提出了分布式量子计算的方案,构建由多个只包含少量量子位处理器组成的量子计算机,有效的解决了制备和操作大数量量子位问题。这种方案可以看作解决由传送者和接受者操纵包含多个由少量量子位组成的网点的量子网络问题。因此在分布式量子计算中利用量子纠缠通道,通过局域操作和经典通讯实现非局域的量子操作就显得非常有意义。我们这里给出了一种有效的简单非局域Toffoli门的腔-QED实现方案。  相似文献
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号