本文選題：量子測(cè)量　切入點(diǎn)：噪聲信道　出處：《渤海大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：自量子信息學(xué)開創(chuàng)以來(lái),在人們不斷努力探索的過(guò)程中,許許多多新的研究課題逐漸出現(xiàn)在各個(gè)領(lǐng)域。作為量子信息中兩大重要資源之一的量子糾纏,它對(duì)于量子信息起著決定性的作用,成為當(dāng)前量子信息領(lǐng)域的前沿課題之一。伴隨著這些課題的出現(xiàn),在諸多研究方面遭遇了許多困難,例如多粒子糾纏態(tài)制備,在噪聲信道和損耗的信道中分發(fā)量子態(tài)等等�；诳藸柦橘|(zhì)的非線性,本文提出了一個(gè)三光子極化糾纏W態(tài)的制備方案�？紤]聯(lián)合噪聲的影響,本文提出了一個(gè)多光子極化糾纏態(tài)的分發(fā)方案。本文共四章。第一章主要對(duì)量子信息學(xué)的產(chǎn)生過(guò)程以及現(xiàn)階段的發(fā)展現(xiàn)狀作出簡(jiǎn)單介紹。第二章給出了與研究?jī)?nèi)容相關(guān)的一些預(yù)備知識(shí),如量子比特,單比特量子態(tài)變換,糾纏態(tài)的定義,非線性交叉克爾效應(yīng)以及量子測(cè)量等等。第三章的主體內(nèi)容是三光子極化糾纏W態(tài)的制備,這里分成了幾部分來(lái)說(shuō)明,分別是W態(tài)簡(jiǎn)介,三光子的空間糾纏進(jìn)程,兩光子的極化糾纏進(jìn)程以及信道合并進(jìn)程和保真度分析。第四章主要是研究在噪聲信道中,克服聯(lián)合噪聲的影響,利用其它的自由度來(lái)進(jìn)行多光子極化糾纏態(tài)的分發(fā),并給出了這個(gè)方案的容錯(cuò)能力。最后給出了本文的總結(jié)。
[Abstract]:Since the creation of quantum informatics, many new research subjects have appeared in various fields in the process of continuous exploration. As one of the two important resources of quantum information, quantum entanglement, It plays a decisive role in quantum information and has become one of the frontier topics in the field of quantum information. With the emergence of these topics, it has encountered many difficulties in many aspects of research, such as the preparation of multi-particle entangled states. Quantum states are distributed in noise channels and lossy channels. Based on the nonlinearity of Kerr medium, a three-photon polarization entangled W state is proposed in this paper. In this paper, we propose a scheme for the distribution of multiphoton polarized entangled states. In this paper, there are four chapters. The first chapter is a brief introduction to the process of quantum informatics and the present development of quantum informatics. For some preparatory knowledge, For example, quantum bit, single-bit quantum state transformation, definition of entangled state, nonlinear cross-Kerr effect, quantum measurement and so on. The third chapter is about the preparation of three-photon polarization entangled W state, which is divided into several parts. It is a brief introduction of W states, a three-photon spatial entanglement process, a two-photon polarization entanglement process, a channel merging process and a fidelity analysis. Chapter 4th focuses on overcoming the influence of joint noise in noise channels. The other degrees of freedom are used to distribute the multi-photon polarization entangled states, and the fault-tolerant ability of the scheme is given. Finally, the conclusion of this paper is given.
【學(xué)位授予單位】：渤海大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O413

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本文編號(hào)：1562769