隐形传态中的纠缠相干态

IF 2.8 4区 生物学 3 Biotech Pub Date : 2022-09-02 DOI:10.26565/2312-4334-2022-3-05
Shivani A. Kumar, S. Kanwar, Pramila Shukla
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引用次数: 1

摘要

本文综述了利用偏振分束器和克尔非线性产生纠缠相干态叠加的方法。这些相干态具有许多吸引人的特征,可用于各种方案。纠缠,指的是多粒子系统的叠加,并解释了量子系统中任意两个子系统之间的一种新的关联,这在经典物理学中是不存在的。本文讨论了这些态在量子隐形传态、纠缠转移和纠缠交换方案中的应用。纠缠转移和纠缠交换是指一种可以使以前没有相互作用的粒子纠缠在一起的方案。在交换方案中,采用两对纠缠态。每对粒子中的一个要进行贝尔态测量。这将导致另外两个出射粒子在纠缠对中的投影。此外,还研究了双模态和三模态的量子隐形传态。最小保证保真度定义为任意未知量子态信息的保真度的最小值。本文还展示了奇偶相干态叠加的隐形传态成功率如何从50%提高到几乎100%。van Enk和Hirota提出的方案在2007年被Prakash, Chandra, Prakash和Shivani修改。我们发现,只要将真空态与偶态分离,就可以实现隐形传态、转移和交换。本文还研究了退相干和噪声对这些状态的影响,以及噪声对保真度和最小保证保真度的影响。还讨论了这些方案也可以应用于纠缠转移和纠缠交换过程。
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Entangled Coherent States in Teleportation
In the present paper, we will review the methods to produce superposition of entangled coherent state using polarizing beam splitter and Kerr non linearity. These coherent states have many attractive features and can be used in various schemes. Entanglement, refers to the superposition of a multiparticle system and explains a new type of correlations between any two subsystems of the quantum system, which is not existing in the classical physics. The present paper deals with the use of these states in quantum teleportation, entanglement diversion and entanglement swapping schemes. Entanglement diversion and entanglement-swapping refers to a scheme which may entangle those particles which had never interacted before. In the swapping scheme, two pairs of entangled state are taken. One particle from each pair is subjected to a Bell-state-measurement. This would result in projection of the other two outgoing particles in an entangled pair. Quantum Teleportation of two mode and three modes states is also studied with perfect fidelity. Minimum assured fidelity which is defined as the minimum of the fidelity for any unknown quantum information of the states is also discussed. It is also shown how the success rate of teleportation of a superposition of odd and even coherent states can be increased from 50% to almost 100%. The scheme suggested by van Enk and Hirota was modified by Prakash, Chandra, Prakash and Shivani in 2007. We find that an almost teleportation, diversion and swapping is possible by simply separating vacuum state from the even state. The present paper also deals with study of effect of decoherence and noise on these states and the effect of noise on fidelity and minimum assured fidelity. It is also discussed that these schemes can also be applied to the process of entanglement diversion and entanglement swapping.
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来源期刊
3 Biotech
3 Biotech BIOTECHNOLOGY & APPLIED MICROBIOLOGY-
自引率
0.00%
发文量
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期刊介绍: 3 Biotech publishes the results of the latest research related to the study and application of biotechnology to: - Medicine and Biomedical Sciences - Agriculture - The Environment The focus on these three technology sectors recognizes that complete Biotechnology applications often require a combination of techniques. 3 Biotech not only presents the latest developments in biotechnology but also addresses the problems and benefits of integrating a variety of techniques for a particular application. 3 Biotech will appeal to scientists and engineers in both academia and industry focused on the safe and efficient application of Biotechnology to Medicine, Agriculture and the Environment.
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