發(fā)布時(shí)間：2018-04-14 16:04

  本文選題：單光子源 + 摻鉺光纖��； 參考：《聊城大學(xué)》2017年碩士論文

【摘要】：單光子源在量子物理學(xué)和量子通信中有著極其重要的作用,在量子光學(xué)所涉及到的光源中是一種很基本的光源,有著很普遍的應(yīng)用。自研究人員發(fā)現(xiàn)單光子源的重要性,量子信息科學(xué)領(lǐng)域中對(duì)于單光子源和單光子探測(cè)器的研究出現(xiàn)爆發(fā)式增長。量子信息科學(xué)涉及到編碼、通信、處理和利用量子力學(xué)粒子測(cè)量信息。研究表明量子計(jì)算中利用量子比特比經(jīng)典粒子有著更高的安全性。單光子源的制備已經(jīng)在很多材料或系統(tǒng)中實(shí)現(xiàn):單原子、單分子、量子點(diǎn)和色心等,單光子源在量子力學(xué)基礎(chǔ)實(shí)驗(yàn)和量子計(jì)算以及光量子信息處理中有著很重要的應(yīng)用。每一種制備方法有它的優(yōu)點(diǎn),但同時(shí)也有相應(yīng)的缺陷限制著它的使用。具有高效率和高度不可區(qū)分性的單光子源在半導(dǎo)體量子點(diǎn)中已經(jīng)被發(fā)現(xiàn),但是其需要的很低的溫度成為了其商用化的主要障礙。為此本文提出一種可以工作在室溫環(huán)境條件下,具有高度不可區(qū)分性,波長可調(diào)的確定性的單光子源,這種單光子源是基于摻雜鉺(3(10)Er)粒子的摻鉺光纖的,由于摻雜了鉺粒子,使得光纖具有自發(fā)輻射特性。在分析各種單光子源的制備方法和優(yōu)缺點(diǎn)以及單光子源理論基礎(chǔ)后,提出基于摻鉺光纖的單光子源,并搭建實(shí)驗(yàn)系統(tǒng)測(cè)量其主要的性能指標(biāo):不可區(qū)分性和二階相關(guān)函數(shù),利用單光子源探測(cè)器進(jìn)行符合探測(cè),通過實(shí)驗(yàn)測(cè)量和計(jì)算,最終測(cè)量得到的不可區(qū)分性高達(dá)99%,顯示了基于摻鉺光纖的單光子源在量子通信中的潛在應(yīng)用。通過單光子探測(cè)器探測(cè),單光子探測(cè)器通道1和通道2在零延時(shí)處的符合計(jì)數(shù)為零,這一實(shí)驗(yàn)結(jié)果摻鉺光纖經(jīng)過衰減之后,是可以制備單光子源的,而且很是接近理想的單光子源。
[Abstract]:Single photon source plays an extremely important role in quantum physics and quantum communication. It is a very basic light source in quantum optics and has a very common application.Since researchers have discovered the importance of single photon sources, the research of single photon sources and single photon detectors in the field of quantum information science has increased explosively.Quantum information science involves coding, communication, processing and using quantum mechanical particles to measure information.It is shown that the use of quantum bits in quantum computation is more secure than that of classical particles.The preparation of single photon source has been realized in many materials or systems: single atom, single molecule, quantum dot and color center, etc. Single photon source has important applications in quantum mechanics basic experiments, quantum calculation and optical quantum information processing.Each preparation method has its own advantages, but at the same time, there are corresponding defects to limit its use.Highly efficient and indistinguishable single photon sources have been found in semiconductor quantum dots, but their low temperature is the main obstacle to their commercialization.In this paper, a deterministic single-photon source with highly indistinguishable and tunable wavelength is proposed, which is based on erbium-doped erbium-doped fiber with Erbium ~ (3 +) ~ (10) er) particles, because it is doped with er ~ (3 +) particles.The fiber has spontaneous emission characteristics.After analyzing the preparation methods, advantages and disadvantages of various single photon sources and the theoretical basis of single photon sources, a single photon source based on erbium-doped fiber is proposed, and the main performance indexes are measured by an experimental system: indiscernibility and second-order correlation function.The coincidence detection with single photon source detector is carried out. Through experimental measurement and calculation, the indiscernibility of the final measurement is as high as 99%, which shows the potential application of single photon source based on erbium doped fiber in quantum communication.Through single photon detector detection, the coincidence counting of channel 1 and channel 2 at zero delay is zero. After attenuation of erbium doped fiber, single photon source can be prepared.And very close to the ideal single photon source.
【學(xué)位授予單位】：聊城大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN253

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本文編號(hào)：1750023