發(fā)布時間：2018-11-24 21:14

【摘要】：本論文致力于從實驗上探究光量子信息科學(xué)中一種新興的研究框架,其整合了傳統(tǒng)上分隔已久的兩種分別基于離散變量與連續(xù)變量的路線,將光子探測(光子數(shù))和平衡零拍探測(光場位相及振幅分量)結(jié)合在一個實驗當中,充分利用了各自在光量子信息處理中的特點和優(yōu)勢。在這種混合架構(gòu)下,我們首先在實驗上制備了兩種高純度的非高斯態(tài),即光子數(shù)態(tài)和薛定諤貓態(tài),他們分別對應(yīng)著光量子信息中兩種不同的量子比特載體。得益于高探測效率的超導(dǎo)納米線單光子探測器,量子態(tài)的制備率達到了前所未有的水平,這極大地促進了其在后續(xù)量子信息協(xié)議中的應(yīng)用。比如,基于上述兩種量子態(tài),我們首次在實驗上實現(xiàn)了一種包含“類粒子”和“類波動”量子比特的雜化糾纏態(tài),并將其拓展到量子三元之間的雜化糾纏態(tài)。這種全新的糾纏態(tài)為異質(zhì)光量子信息網(wǎng)絡(luò)的實現(xiàn)鋪平了道路,從而有效地結(jié)合基于離散和連續(xù)變量的操作和技術(shù)。此外,我們也首次在實驗上展示了一種光場壓縮致使的微觀一宏觀糾纏態(tài)。除了所述量子態(tài)的制備,基于時域同步的光纖激光器,我們還搭建了一套高效率低噪聲的頻率上轉(zhuǎn)換系統(tǒng)。這套轉(zhuǎn)換系統(tǒng)不僅能夠?qū)⒘孔討B(tài)的頻譜延伸到現(xiàn)有技術(shù)難以實現(xiàn)的波長,而且其本身也可以作為一個高效率的紅外光子探測器。基于這套系統(tǒng),我們分別實現(xiàn)了紅外光子可分辨探測和少光子水平紅外靈敏成像。
[Abstract]:This thesis is devoted to exploring experimentally a new research framework in optical quantum information science, which integrates two long-separated routes based on discrete variables and continuous variables, respectively. Photon detection (photon number) and balanced zero-beat detection (light field phase and amplitude component) are combined in a single experiment to make full use of the characteristics and advantages of each other in optical quantum information processing. In this hybrid structure, we first prepare two kinds of high purity non-Gao Si states, namely photon number state and Schrodinger cat state, which correspond to two different quantum bit carriers in optical quantum information. Thanks to the high detection efficiency of the superconducting nanowire single-photon detector, the preparation rate of quantum state has reached an unprecedented level, which greatly promotes its application in the subsequent quantum information protocol. For example, based on the above two quantum states, we first implement a hybrid entangled state containing "quasi-particle" and "quasi-wave" quantum bits, and extend it to the hybrid entangled state between quantum ternary. This new entangled state paves the way for the realization of heterogeneous optical quantum information networks, thus effectively combining operations and techniques based on discrete and continuous variables. In addition, we also show a microscopic and macroscopic entangled state caused by light field squeezing for the first time. In addition to the preparation of the quantum states, a high efficiency and low noise frequency up-conversion system is built based on the time-domain synchronous fiber laser. This conversion system can not only extend the spectrum of quantum states to wavelengths that are difficult to be realized in the existing technology, but also act as a highly efficient infrared photonic detector. Based on this system, infrared photonic resolution detection and low photon level infrared sensitive imaging are realized respectively.
【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：O431.2
，

本文編號：2355086