本文選題：量子Zeno效應(yīng) + 量子關(guān)聯(lián)��； 參考：《天津工業(yè)大學(xué)》2017年碩士論文

【摘要】：隨著量子信息的發(fā)展,量子糾纏和量子Zeno效應(yīng)的研究引起人們廣泛的關(guān)注。本文研究了原子-場系統(tǒng)中的量子關(guān)聯(lián)和量子Zeno效應(yīng)。本文在第一章中簡單介紹了原子-場系統(tǒng)量子關(guān)聯(lián)和量子Zeno效應(yīng)的產(chǎn)生背景與發(fā)展前景。在第二章中詳細(xì)介紹了量子測量、量子Zeno效應(yīng)、量子熵、量子糾纏與量子discord等方面研究內(nèi)容與方法。在第三章針對原子與場作用下的系統(tǒng),在Jaynes-Cummings模型下,頻繁測量與原子-場間糾纏度的關(guān)系。隨著測量時間間隔的減小,初態(tài)存活幾率不衰減,出現(xiàn)量子Zeno效應(yīng)。在第四章中研究了兩個原子依次通過一個腔中的動力學(xué)糾纏特性。分別考慮場處于Fock態(tài)和熱態(tài)下兩原子糾纏隨時間演化趨勢,以及糾纏死亡現(xiàn)象。在第五章中研究了在壓縮真空庫中,原子與場相互作用下的二比特系統(tǒng)量子discord與量子糾纏的動力學(xué)行為。重點分析了原子的初始態(tài)系數(shù)和壓縮真空庫的壓縮系數(shù)對量子糾纏和量子discord的影響。最后研究了在原子的初始態(tài)系數(shù)和壓縮真空庫的壓縮系數(shù)的值相同的情況下,量子discord比量子糾纏存在的時間更長些。
[Abstract]:With the development of quantum information, the study of quantum entanglement and quantum Zeno effect has attracted much attention.Quantum correlation and quantum Zeno effect in atom-field system are studied in this paper.In the first chapter, the background and prospect of quantum correlation and quantum Zeno effect in atom-field system are briefly introduced.In the second chapter, quantum measurement, quantum Zeno effect, quantum entropy, quantum entanglement and quantum discord are introduced in detail.In the third chapter, the relationship between frequent measurements and the degree of entanglement between atoms and fields in the Jaynes-Cummings model for the system under atomic and field action is discussed.With the decrease of the measurement time interval, the survival probability of the initial state does not decrease and the quantum Zeno effect occurs.In chapter 4, the dynamical entanglement of two atoms passing through a cavity is studied.The evolution trend of entanglement with time and the phenomenon of entanglement death in Fock state and hot state are considered respectively.In chapter 5, the dynamical behavior of quantum discord and quantum entanglement of two-bit system under the interaction of atom and field in squeezed vacuum library is studied.The effects of the initial state coefficients of atoms and the squeezing coefficients of squeezed vacuum libraries on quantum entanglement and quantum discord are analyzed.Finally, the existence time of quantum discord is longer than that of quantum entanglement when the initial state coefficient of atom is the same as the squeezing coefficient of squeezed vacuum library.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O413

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本文編號：1765401